aowang / symja Goto Github PK

-----------------------------------------
1. What steps will reproduce the problem?
-----------------------------------------
1.1. Create a DoubleEvaluator.
1.2. Define a BooleanVariable, and add it to the DoubleEvaluator.
1.3. Run evaluate for the following expression:

If[booleanVariable,1,0]

-------------------------------
2. What is the expected output?
-------------------------------
1.0 if booleanVariable is True, else .0

---------------------------
3. What do you see instead?
---------------------------
An Exception is generated:
EvalDouble#evaluateNodeLogical(ASTNode) not possible for: booleanVariable

-----------------------------------------------------------------------
4. What version of the product are you using? On what operating system?
-----------------------------------------------------------------------
I used the jar file meparser-0.0.6.jar and GWT 2.0.3.

Issue 7 still seems to exist, therefore I couldn't try symja-0.0.7a.jar

---------------------------------------------------
5. Please provide any additional information below.
---------------------------------------------------
Very great library!
It would be great if the source code could be available for symja-0.0.7a,
so that it would work on GWT!

What steps will reproduce the problem?
1.Using util.evaluate(1.0-(1.0-1*(2)))
2.Parsing the result with:

       OutputFormFactory.get().convert(buf, result);
       String s = buf.toString();

What is the expected output? What do you see instead?
Expected: 2 Instead: 2.0+I*(-2.4492935982947064E-16)

What version of the product are you using? On what operating system?
meconsole010 with Ubuntu Linux 10.04

Please provide any additional information below.

It works fine with meconsole009

What steps will reproduce the problem?
Calling the functions: "Integrate[Sin[x]^3,x]", "Integrate[Cos[2x]^3,x]".

What is the expected output? What do you see instead?
The functions don't work.

What version of the product are you using? On what operating system?


Please provide any additional information below.
I see the rules of Integrate[] function about power of Sin, Cos. But they don't 
work.

Use 
Solve[2.5x^2+1650==0,x] or Solve[x^2-2500.00==0,x]

equation like above examples are  could not be  solved by using Ajax online 
Calculator

What steps will reproduce the problem?
1. I call function "0*Infinity", the result is "Infinity". But, in my opinion, 
it has to be "Indeterminate". Is it bug?

What is the expected output? What do you see instead?


What version of the product are you using? On what operating system?


Please provide any additional information below.

What steps will reproduce the problem?
1. ASTNode ast = parser.parse("-a");
2. ASTNode ast2 = parser.parse("a-b");
3.

What is the expected output? What do you see instead?
expected : ast.toString() -> Minus[a]
instead : ast.toString() -> Times[-1,a]

expected2 : ast2.toString() -> Minus[a,b]
instead2: ast2.toString() -> Plus[a,Times[-1,b]]

What version of the product are you using? On what operating system?
matheclipse-parser-0.0.10.jar

Please provide any additional information below.
can i modify operator.txt to have this behavior and how to?

Code compiled against previous releases could rely on F.initSymbols();
The new code only has F.initSymbols(String s);

After looking at the implementation, I propose that you should add an 
overloaded call to preserve backwards compatibility:

public F.initSymbols() {
  F.initSymbols(null);
}

Thanks!

The Factorial function does not properly handle doubles expressed as 
integers.  

Try solving Factorial[3] and you get 6, 
try 3.0! and instead of getting the value 6.0 you get Factorial[3.0] 

What version of the product are you using? On what operating system?
Symja 0.0.7 WinXP JRE 1.6

Aditional information:

Bug is in this block of code:

final IEvaluator module = symbol.getEvaluator();
if ((module != null) && (module instanceof ISymbolEvaluator)) {
  if (fNumericMode) {
    return ((ISymbolEvaluator) module).numericEval(symbol);
  }
  return ((ISymbolEvaluator) module).evaluate(symbol);
}
return null;

When fNumericMode is true, it calls Factorial.numericEval() instead of 
Factorial.evaluate().   Factorial inherits evaluate() from AbstractTrigArg1, 
which calls evaluateArg1() that Factorial overrides with 
the correct implementation.   

But when Factorial.numericEval() is called, it resolves in 
AbstractTrigArg1.numericEval(), which ends up calling 
Factorial.numericEvalD1() when the input is a number (e.g. 3.0) - and 
Factorial simply returns null for numericEvalD1(); hence the value doesn't 
calculate.   

I would speculate that either Factorial should implement numericEvalD1(), 
or it should not extend AbstractTrigArg1, or there is an issue with the way 
numeric implementations are resolved; but I'm not sure. 

I should note that it's possible that other system functions have this 
problem as well.  

What steps will reproduce the problem?
1. Evaluate a symbol like "Pi" in pretty printer mode

What is the expected output? What do you see instead?

It's expected to see the MathML output for "Pi" but instead it throws 
exception:

Caused by: org.xml.sax.SAXParseException: The entity "pi" was referenced, 
but not declared.
    at 
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseE
xception(ErrorHandlerWrapper.java:195)
    at 
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Erro
rHandlerWrapper.java:174)
    at 
com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErr
orReporter.java:388)
    at 
com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScan
ner.java:1411)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scan
EntityReference(XMLDocumentFragmentScannerImpl.java:1885)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$Frag
mentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3017)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocu
mentScannerImpl.java:645)
    at 
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNS
DocumentScannerImpl.java:140)
    at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scan
Document(XMLDocumentFragmentScannerImpl.java:508)
    at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Co
nfiguration.java:807)
    at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Co
nfiguration.java:737)
    at 
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:1
07)
    at 
com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:2
25)
    at 
com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentB
uilderImpl.java:283)
    at 
net.sourceforge.jeuclid.parser.Parser.parseStreamSourceAsXml(Parser.java:31
8)
    at 
net.sourceforge.jeuclid.MathMLParserSupport.parseString(MathMLParserSupport
.java:143)
    at 
net.sourceforge.jeuclid.swing.JMathComponent.setContent(JMathComponent.java
:315)
    ... 9 more

What steps will reproduce the problem?
1. I call the function "Apart[1/((1 + x) (5 + x))]" in Console but it not works.


What is the expected output? What do you see instead?
-1/4*(x+5)^(-1)+1/4*(x+1)^(-1)

What version of the product are you using? On what operating system?


Please provide any additional information below.
When I track your codes in file Expand.java, I understand why the problem 
arrived:
public static IAST[] getFractionalParts(final IAST timesAST) {
                IAST[] result = new IAST[2];

                IAST numerator = F.Times();
                IAST denominator = F.Times();
                final IAST ast = (IAST) timesAST;
                IExpr arg;
                IAST temp;
                for (int i = 1; i < ast.size(); i++) {
                        arg = ast.get(i);
                        if (arg.isAST(F.Power, 3)) {
                                temp = (IAST) arg;
                                if (temp.get(2) instanceof ISignedNumber) {
                                        if (temp.get(2).equals(F.CN1)) {
                                                denominator.add(temp.get(1));
                                                continue;
                                        }
                                        if (((ISignedNumber) temp.get(2)).isNegative()) {
                                                denominator.add(F.Power(temp.get(1), ((ISignedNumber) temp.get(2)).negate()));
                                                continue;
                                        }
                                }
                        }
                        numerator.add(arg);
                }
                result[0] = numerator;
                result[1] = denominator;
                return result;

        }
I modify to:
  IAST numerator = F.Times();  
  IAST denominator = F.Times();
  numerator.add(F.integer(1));
  denominator.add(F.integer(1));
It work fine!
I hope it will be useful for you.

What steps will reproduce the problem?
Following  Equation could not be solved in online Symja Application 
Solve[a+2x==0,x] 

What is the expected output?
{{x->(-1/2)*a}}

 What do you see instead?
Error:
Error in evaluateString: a


Solution:

Symbol.java  class not override the method negate();

Code:
@Override
    public IExpr negate() {
        return F.function(F.Times, F.CN1, this);
    }

Sum[Integrate[Sin[i*x],{x,0,N}],{i,1,M}] - integrated normally(even result is 
same as input), but this
Integrate[Sum[Sin[i*x],{i,1,M}],{x,0,N}] - is cycled somewhere.
Both expressions are equals.

What steps will reproduce the problem?
1.Type the following equation Solve[y+x/a==0,y] in  online symja
2.
3.

What is the expected output? What do you see instead?
Error: Error in evaluateStringNullPointerException  error comes

What version of the product are you using? On what operating system?


Please provide any additional information below.

What steps will reproduce the problem?
I call the function: "Integrate[2x^2/(x^3+1),x]"

What is the expected output? What do you see instead?
The expected output is 2/3 log(x^3+1). But the result is 
2/3*1/3*Log[x+1]*Log[x^2+x+2]

What version of the product are you using? On what operating system?


Please provide any additional information below.

Is there a possibility that MathEclipse core + MathEclipse parser could be 
released to be compatible with Java 1.5?  I understand that may mean 
excluding certain features, such as JSR223 support. 

What steps will reproduce the problem?

1. Running the code put in second answer.

What is the expected output? What do you see instead?

The follwing code should print 0 as 0^2 = 0, but it instead prints NaN+I*(NaN)

ComplexEvaluator engine = new ComplexEvaluator();
Complex answer = engine.evaluate( "0^2");
System.out.println( ComplexEvaluator.toString( answer ) );

What version of the product are you using? On what operating system?

meparser-0.0.6.jar, Windows Vista


Please provide any additional information below.

What steps will reproduce the problem?
I write a class:
public class TestMathML {

    public TestMathML(){

    }
    public String getMathMl(String anExpression)
    {
            StringWriter stringWriter = new StringWriter();
            new MathMLUtilities(new EvalEngine(),
            false).toMathML(anExpression, stringWriter);
            return stringWriter.toString();
    }
    public static void main(String[] args){
        TestMathML a = new TestMathML();
        System.out.println(a.getMathMl("Abs[-x]"));

    }
}

When program run, it throws some exception.

What is the expected output? What do you see instead?


What version of the product are you using? On what operating system?


Please provide any additional information below.

Use 
Solve[x+5==a,x]

What is the expected output? What do you see instead?
a-5 should be the output,but I am seeing {{x->-a+5}}

This is tested in Ajax Online Interface

What steps will reproduce the problem?
1. http://mobmath.appspot.com/
2. Input math expression: x - (11 + (7 - x))
3. Click "Sym"

What is the expected output? What do you see instead?
Expected: 2 * x - 18 or -18 + 2 * x
Instead: -(-x+18)+x

What version of the product are you using? On what operating system?
Google Chrome browser 10.0.648.204, Ubuntu 10.10, not that it should matter.

svn r649?

Current version of downloadable symja jars are:
Symja-0.0.11-SNAPSHOT.jar, Jan 4 2011, 6.1 MB
meconsole-0.0.10.zip, Nov 20, 2010, 4.2 MB
matheclipse-parser-0.0.10.jar, Jun 2010, 183 KB
symja-0.0.7a.jar, Aug 2009, 4.6 MB
symja-0.0.7a.jnlp

What steps will reproduce the problem?
1.Solve[x^3 + 2x^2 - 5x -3 ==0,x]
2.
3.

What is the expected output?
x = -3.253418
x = -.5199694
x = 1.7733874
 What do you see instead?
{{x->x^3+2*x^2-5*x-3}}

What version of the product are you using? On what operating system?


Please provide any additional information below.

What steps will reproduce the problem?
I call the function Limit: "Limit[(x^2-3*x+2)/(x-1),x->1]"

What is the expected output? What do you see instead?
The expected ouput is -1. But the result which I see is 0.

What version of the product are you using? On what operating system?


Please provide any additional information below.

Started adding Trig Function Integration Rules from the Rubi "rule-based 
integrator":
http://www.apmaths.uwo.ca/~arich/

Current SVN sources don't work at the moment and don't use these rules:
http://code.google.com/p/symja/source/detail?r=676

For activating the rules in the Integrate[] function uncomment the lines in the 
method:
org.matheclipse.core.reflection.system.Integrate#getRuleAST() 

This needs a lot more work before working as expected!

Are there any plans to release the sourcecode of the Android port?

I would like to look into it and perhaps improve it.

I just tried to get roots for Equation NRoots[4*x^(-2)-1] by using Online Symja

but could not get the expected result 

Return value of the Integrate[] function needs to be converted from JAS


Implementation in JASConvert is still missing.
org.matheclipse.core.convert.JASConvert#integral2Expr() and
org.matheclipse.core.convert.JASConvert#logIntegral2Expr()

See: http://code.google.com/p/symja/source/detail?r=277

Input: 
  Apart[(10*x^2-63*x+29)/(x^3-11*x^2+40*x-48)]

The third case: "A repeated first-degree factor in the denominator"
in the Wikipedia Example:
 http://en.wikipedia.org/wiki/Partial_fraction
doesn't work

Output from JAS:
Exception in thread "main" java.lang.RuntimeException: not solvable, r
= -63 , c = 10 x^2 - 63 x + 29 , g = x - 4
       at
edu.jas.ufd.GreatestCommonDivisorAbstract.baseGcdDiophant(GreatestCommonDivisorA
bstract.java:701)
       at
edu.jas.ufd.GreatestCommonDivisorAbstract.basePartialFraction(GreatestCommonDivi
sorAbstract.java:847)
       at edu.jas.integrate.Examples.example4(Examples.java:317)
       at edu.jas.integrate.Examples.main(Examples.java:50)

What steps will reproduce the problem?

Given this equation Solve[((x-8.5)^2)+(y+9.5)^2==1.4,x] in online
symja. not able to get solution. 

but this equation Solve[((x-8.5556577)^2)+(y+9.551234)^2==14/10,x] gives the 
solution.

After equal == symbol, if i put decimal number, symja not giving solution. if i 
converted into faction.. it gives the solution..


Like that  this equation Solve[((x-8.5)^2/2.1)+(y+9.5)^2==14/10,x]  not giving 
the solution.. Instead of 2.1 if i give 21/10, the output is produced 

An expression like (1+(1/x))/(1+(2/x)) doesnt simplify to (1+x)/(2+x) 
similar as it happens in Mathematica?
Is this a bug?

What steps will reproduce the problem?
I call the function: Integrate[x^2/(x^2+1),x]

What is the expected output? What do you see instead?
The expected output is x - ArcTan[x]. But the result is 
-x*Log[3*x]+x*Log[(-1)*x]+x.

What version of the product are you using? On what operating system?


Please provide any additional information below.
Is it bug?

What steps will reproduce the problem?
- Import the Android project into Eclipse

What is the expected output?
- A successful compile after which the application starts on my device.

What do you see instead?
- Eclipse freezing and running out of memory (even with 1GB heap) in the 
"Launching SymjaDroid" stage. (http://puu.sh/sAhg)

What version of the product are you using? On what operating system?
- Revision 871 from the SVN.
- Windows 7 64-bit
- Eclipse Indigo with "Xmx1024MB"
- Java compiler compliance level: 1.6
- Intel Core i5 2500K @ 3.30 Ghz, 8.00GB Single-Channel DDR3 RAM, 977GB SAMSUNG 
HD103SJ HDD, 125GB M4-CT128M4SSD2 SSD

Please provide any additional information below.

I'd really like to hear how one gets this to compile, because symja is 
absolutely essential in my application.

I've included the version of the Android project I'm trying to build just to be 
sure.

What steps will reproduce the problem?
- Try to solve E^(Pi*I).


What is the expected output? What do you see instead?
-  It should be a hard-coded rule that it evaluates to -1.  See:
http://en.wikipedia.org/wiki/Euler's_identity


What version of the product are you using? On what operating system?
Symja 0.0.7 on Windows XP, JRE 1.6


Please provide any additional information below.
-N/A

What steps will reproduce the problem?
1.When I build the android symja version, it's successful. But when running it 
into android device, it has an error: Java heap space. I don't know why it is. 
Do you have the same problem?

What steps will reproduce the problem?
Following equation not resolved 

Simplify[Sqrt[x^2]]


What is the expected output? 
x

What do you see instead?
x^2^(1/2)

Hi
Thanks for the software.Learning it and using it becomes easy since it mirrors 
the Mathematica syntax..

Do you have any plans to include solving differential equations?

Thanks

What steps will reproduce the problem?
I call the function: "Integrate[1/(x^3+1),x]

What is the expected output? What do you see instead?
I use the wolframalpha.com, the result is (2 Sqrt[3] ArcTan[(-1 + 2 x)/Sqrt[3]] 
+ 2 Log[1 + x] - Log[1 - x + x^2])/6. But in symja, the result is 
x*Log[4*x]+1/3*Log[x+1]-x*Log[-2*x-1]. Is it bug?

What version of the product are you using? On what operating system?


Please provide any additional information below.

public String getMathMl(String anExpression)
{
        StringWriter stringWriter = new StringWriter();
        new MathMLUtilities(new EvalEngine(),
        false).toMathML(anExpression, stringWriter);
        return stringWriter.toString();
}

getMathMl("x^-1"); or getMathMl("x^(-1)");

Produces:

<math>
    <msup>
        <mi>x</mi>
        <mo>(</mo>
        <mn>-1</mn>
        <mo>)</mo>
    </msup>
</math>

Expected is:
<math>
    <msup>
        <mi>x</mi>
        <mrow>
            <mo>(</mo>
            <mn>-1</mn>
            <mo>)</mo>
        </mrow>
    </msup>

</math>

Using:

commons-logging-1.1.1.jar
google-collect-1.0-rc3.jar
jsr305.jar
log4j-1.2.11.jar
meconsole009.jar

Tested in FireFox 3.6.3

Hi
Thanks for the software.Do you have any plans for adding trignometeric 
simplifications?
Do you have any plans for including these features?

What steps will reproduce the problem?
1. open: http://mobmath.appspot.com/
2. type into --> NRoots[1x^3+2x^2+2x+2] 
3. Compare with http://www.1728.org/cubic.htm

What is the expected output? What do you see instead?
x1 =   -1.5436890126920766
x2 =  -0.22815549365396165 + i* 1.1151425080399373
x3 =  -0.22815549365396165 - i* 1.1151425080399373

What version of the product are you using? On what operating system?
I use SymjaDroid in my project. I found the bug 042#, so I update some source 
code, then I found the result of NRoots[] for some Equation is wrong. 

Please provide any additional information below.

What steps will reproduce the problem?
1.Limit[Sum[k,{k,0,x}],x->5]
2.Output showing same input.
3.

What is the expected output? What do you see instead?

Compare with Problem 12:
 https://www.math.ucdavis.edu/~kouba/CalcTwoDIRECTORY/summationsoldirectory/SummationSol.html#SOLUTION%201.

What version of the product are you using? On what operating system?
Tried in Online Symja

Please provide any additional information below.

For EvalEngine.get().evaluate("32^(1/4)"); 
the calculation will hang.

See: http://groups.google.com/group/matheclipse/t/1478be1bfd741cec?hl=en_US

What steps will reproduce the problem?
I call the function "Sqrt[x^2]"

What is the expected output? What do you see instead?
The expected output is Abs[x]. But the result I saw is x. 

What version of the product are you using? On what operating system?


Please provide any additional information below.

What steps will reproduce the problem?
1. Download newest source.
2. Cd into downloaded directory.
3. Type ant (or ant -p [any]build.xml)

What is the expected output? What do you see instead?

Project should compile correctly.

What version of the product are you using? On what operating system?

Newest source version. Compiling on Ubuntu Linux 10.04, with ant version 1.8.4 
and java version 1.6.0_24 (OpenJDK).

Please provide any additional information below.

Please provide compilable code. I've tried to compile matheclipse-core and 
other packages to use them in my procject. I've manually got rid of every 
dependency, recompiled every needed package, and got 2 errors in 
JASConvert.java, lines 234 and 235: "inconvertible types". I'd like to use 
libraries without GUI, so I have to recompile manually. Also I'd like to attach 
source code to used libraries which is impossible with provided jar downloads 
and source code.

What steps will reproduce the problem?
1.Calling function "Expand[1/((x-1)(1+x))]".

What is the expected output? What do you see instead?
The result has to be (x^2-1)^(-1). Instead of it's (x-1)*(x+1).

What version of the product are you using? On what operating system?

meconsole0.0.9
Please provide any additional information below.

What steps will reproduce the problem?
1. Type something like "Prime"


What is the expected output? What do you see instead?
It's expected that the auto-suggestion function returns "PrimeQ[]" for 
example, but instead it returns "Primeq[]"

What steps will reproduce the problem?
1.Solve[Equal[(x-1.5)(x-1)(x-2), 0], x]
2.
3.

What is the expected output?
{{x->1.5},{x->2},{x->1}}

 What do you see instead?
Solve[(x-1.5)*(x-2)*(x-1)==0,x]


What version of the product are you using? On what operating system?


Please provide any additional information below.

(Only a minor issue)

What steps will reproduce the problem?

-Downloading the latest SVN revision 537 has "symja/surface-plotter/..." 
missing in the source in the Java Build Path.

What is the expected output?

-"symja/surface-plotter/..." is not expected to be in the build path or to it 
is expected to be included in the download.

What version of the product are you using? On what operating system?

-Revision 537 from http://symja.googlecode.com/svn/trunk

Please provide any additional information below.

- Using Eclipse Galileo IDE for Java Developers with subclipse 
http://subclipse.tigris.org/

matheclipse-parser-0.0.7.jar is missing Parser.gwt.xml and source code 

What steps will reproduce the problem?
I call the function: "Integrate[(x^2+1)Log[x],x]"

What is the expected output? What do you see instead?
The expected output is 1/9 x (-x^2+3 (x^2+3) log(x)-9). 
But it doesn't work.

What version of the product are you using? On what operating system?


Please provide any additional information below.

I do this:

Integrate[D[Tan[x],x],x] and I get this throwable:

java.lang.NoClassDefFoundError: edu/jas/poly/TermOrder

adding

import edu.jas.poly.TermOrder in my .java file doesn't solve the problem. The 
source code I use for the operation is:
private EvalUtilities util;
private IExpr result;

MainMethodHere(){
result = util.evaluate("Integrate[D[Tan[x],x],x]");
OutputFormFactory.get().convert(buf, result);
String output = buf.toString();
System.out.println("OUT: "+output);
}

Simplify[] sometimes doesn't work too.

What steps will reproduce the problem?
I call the function: Limit[1/x,x->Infinity]

What is the expected output? What do you see instead?
The expected output is 0. But that command doesn't work.

What version of the product are you using? On what operating system?


Please provide any additional information below.