MATLAB: Plotting information that is above a certain threshold

thresholding plotting

If I have a dataset and I want to threshold it I use

 thresh = find(dataset > 100)

however, if I want to plot 'thresh' how would I go about this as I know that the find function just gives the indicies at which these values occur.

If you want to plot the data above threshold, you can use

dataset_new = dataset(find(dataset > 100));
plot(dataset_new)

If you don't have the Mapping Toolbox, m_map is a good stand-in.

temp = -24.5:1:24.5;
mask = temp.^2 .' + temp.^2 > 24.5.^2;
Xt = X;
Xt(mask) = nan;
pcolor(Xt);