MATLAB: How to plot a heatmap of a table where the rows represent y position and columns the x position using the data as the heat variable.

heatmapMATLAB

I am trying to figure out how to create a heat-map from a table where the 4 rows represent frequency bands, the Columns represent experiment number and the data in the table represents spectral power. I am wishing to create the heat-map so that the color represents each experiments spectral power in each of the 4 bands.

Any help would be much appreciated.

Best Answer

Version 2017a introduced the function heatmap. See the documentation:

https://uk.mathworks.com/help/matlab/ref/heatmap.html

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MATLAB: Caxis with HeatMap

Maybe I should have mentioned this in the answer to your previous question, but maybe the HeatMap object's plot method would be useful here. That method will render the heatmap image into a standard MATLAB axes. Then you can use all the standard graphics functions like colorbar and caxis with it.

For example:

data = gallery('invhess',20);
hm = HeatMap(data);
ax = hm.plot; % 'ax' will be a handle to a standard MATLAB axes.
colorbar('Peer', ax); % Turn the colorbar on
caxis(ax, [-3 10]); % Adjust the color limits

MATLAB: Using a for loop to find max value for each row in matrix

Just use max()

>> A=rand(1001,251 );
>> rowmax=max(A,[],2);

Best Answer

Related Solutions

MATLAB: Caxis with HeatMap

MATLAB: Using a for loop to find max value for each row in matrix

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