Replace near-0s with 0
>I want to show them as value ''0'' and not ''0.000'' and for the non-zero values in matrix I want three decimals.
You could replace the near-zeros with 0s where "near zero" is defined by some threashold as shown below. Then show up to 3 significant digits.
% Create data with near-zeros
data = rand(8)*10;
data(3:5:end) = rand(1,13)*10e-06;
% Replace near-zeros with 0
threshold = 10e-05;
data(abs(data) < threshold) = 0;
% plot results
figure()
h = heatmap(data);
h.CellLabelFormat = '%.3g';
Replace near-0s with NaNs
> I don't want to show the digits if the value in the matrix is 0 or almost 0 (like 10^-7)
You could replace the near-zeros with NaNs where "near zero" is defined by some threashold as shown below. Then show 3 decimal places.
% Replace near-zeros with NaN
threshold = 10e-05;
data(abs(data) < threshold) = NaN;
% plot results
figure()
h = heatmap(data);
h.CellLabelFormat = '%.3f';
