def getIntervals(self):
'''Plots a histogram of the time interval length between consecutive
counts.'''
#check if data has been imported. if not, give a warning
if self.dataSet:
#ask for the number of bins for the histogram
labelText = "Enter the desired number of bins in the histogram"
numBins = tksd.askinteger("Intervals Histogram", labelText, parent=self.root, minvalue=1)
if not numBins:
return
#plot the histogram in matplotlib
pd.plotHistOfIntervals(self.dataSet, numBins)
else:
self.showImportAlert()
