Plotting time series about geemap

[giswqs]

It is 30-min data. Your ImageCollection has 1488 bands, which is too much to display. Try the following:

import ee
import geemap

Map = geemap.Map()
ee.Initialize()

# GPM V6 30 minute data around hurricane Dorian for a single day.
range = ee.Date('2019-09-03').getRange('day')
dataset = ee.ImageCollection('NASA/GPM_L3/IMERG_V06') \
    .filter(ee.Filter.date(range))

# Select the max preciptation and mask out low precipitation values.
precipitation = dataset.select('precipitationCal').max()
mask = precipitation.gt(0.5)
precipitation = precipitation.updateMask(mask)

palette = [
  '000096','0064ff', '00b4ff', '33db80', '9beb4a',
  'ffeb00', 'ffb300', 'ff6400', 'eb1e00', 'af0000'
]
precipitationVis = {'min': 0.0, 'max': 15.0, 'palette': palette}
Map.addLayer(precipitation, precipitationVis, 'Precipitation')
Map

[giswqs]

You just need to convert the ImageCollection to Image before using the .toBands() function before adding it to the map. By default, if an ImageCollection is added to the map, it will be converted to an image using .mosaic() function, as an ImageCollection could not generate a tile layer to display on the map. This might not be what you want. So you just need to explicitly convert to an Image using .toBands(). Hope it makes sense.

gpm = ee.ImageCollection('NASA/GPM_L3/IMERG_V06') \
    .filter(ee.Filter.date('2016-01-01', '2016-02-01')) \
    .select('precipitationCal') \
    .toBands()
options = {
#     'bands': ['precipitationCal'],
    'opacity': 0.5,
    'min': 0,
    'max': 15,
#     'palette': ['000096','0064ff', '00b4ff', '33db80', '9beb4a', 'ffeb00', 'ffb300', 'ff6400', 'eb1e00', 'af0000']
}
Map.addLayer(gpm, options, 'GPM');

You can customize the plot parameters to make the plot look nicer.

[davidbrochart]

Thanks. However I don't really know what it displayed on the map, is it the mean precipitation over the time range? I cannot provide a palette, it says there are more than one band, does it mean there are as many bands as dates?
Also if I try to set the range to ('2001-01-01', '2019-01-01') I get a EEException: User memory limit exceeded.

[giswqs]

Hope you have resolved the issue. I am closing this issue for now. Feel free to reopen the issue if the problem persists.