Direction of data/axes using heatmap

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Jack Naumann
Jack Naumann 2018-8-31
评论： Jack Naumann 2018-9-3
Hi there,
I am creating a heatmap using the following code and am generally happy with the results
h=heatmap(data_table,'Cent_Deviation','Height','GridVisible','off')
My only issue is that the y axis is 'upside down' for my purposes - it is a measure of height yet the lowest values are at the top of the figure. Any ideas how to create this heatmap with the smallest y axes run from low to high (as with any 'normal' plot)
Thanks in advance
jack

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回答（1 个）

Naman Chaturvedi
Naman Chaturvedi 2018-9-3
Hi Jack,
You can use the yvalues property of heatmap and use the inverted array of the y axis values to do what you want.
For example: instead of using
>>h=heatmap(data_table);
use
>>h=heatmap([1 2 3 4 5],[5 4 3 2 1],data_table);
HTH.
  1 个评论
Jack Naumann
Jack Naumann 2018-9-3
thanks for your response Naman,
Just a bit of clarification though - does the approach you use not assume the data has already been aggregated i.e. the values in the table directly correspond to the colours in the heatmap - while the approach I used whereby the fields to be used in the heatmap are defined and the function aggregates (a count in this case)? So I would have to do the aggregation separately? Does this not remove half the purpose of the function? Or am I missing something?
thanks again

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