Issue creating a heat map of 512x512 matrix.

I am trying to create a 'image' using a heatmap for this data from a CCD camera in the lab. Each data point is the value from one pixel so I am trying to get matlab to plot that as a heatmap or something similar and cannot figure out how to do so. I appreciate any help you can give me. I attached my current code and the sample data I am working with.

%Input the folder location containing data that is being analyzed
MainFolder = 'C:\Users\nefwa\Downloads\Test';
cd(MainFolder)

rawdatafile = dir('*.csv');
rawdata = rawdatafile.name;

RawDataMatrix = csvread(rawdata, 32, 0);

RawDataMatrix(:,514) = [];
RawDataMatrix(:,1) = [];

xvar = [1:512];
yvar = [1:512];

heatmap(RawDataMatrix, xvar)

Answer 1

[Cris LaPierre]

I suggest using readmatrix instead of csvread.

With a 512x512 matrix, I would suggest imagesc instead of heatmap. Rows correspond to Y, and columns correspond to X. I use colormap jet because it uses a broader range of colors, making differences easier to see.

RawDataMatrix = readmatrix("WaterVapor_660_Dec 2 2020_372.csv","NumHeaderLines", 32);
RawDataMatrix(:,1) = [];

imagesc(RawDataMatrix)
colormap jet
colorbar

However, should you prefer heatmap, try the following.

heatmap(RawDataMatrix,'GridVisible','off');
colormap jet

[Noah Wilson]

Works like a charm. Thank you!