How to plot this frequency graph?

BN
2021 10 9
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更新时间：2021 10 10
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Dear all,
I have runoff and precipitation data (as I attached), how I can achieve such a plot?
I tried this script:
histogram2(precipitation,runoff,'Normalization','count')
But it seems wrong and the range of x and y lines doesn't set between 0 to 1. The name of this plot below is bivariate frequency graph which is a histogram of precipitation and runoff.
Thank you in advance

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Ive J
Ive J 2021-10-10
Do you mean something like this?
pn = normalize(precipitation, 'range');
rn = normalize(runoff, 'range');
histogram2(rn, pn)
BN
BN 2021-10-10
Yes, Thank you, and why do I have blank mosaics in the plot? is there any way to force it to show zero values, instead of leaving them blank? thank you

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Chunru
Chunru 2021-10-10
编辑：Chunru 2021-10-10
Ran in:

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Ran in:
load runoff
load precipitation
precipitation = normalize(precipitation, 'range');
runoff = normalize(runoff, 'range');
histogram2(runoff, precipitation, 'Normalization', 'pdf', 'ShowEmptyBins','on'); % for probability density function

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