If you have the Image Processing Toolbox, you can use imregionalmin(), like this:
% Original code
x = 0: 0.00001: 4;
v = x.*exp(x/2);
t = sin(v);
plot(x,t);
% Image Analyst's code:
minsIndexes = imregionalmin(t); % Logical array of where mins are.
% Extract the t values at those min locations;
minValues = t(minsIndexes)
% Get the x values at those mins.
minX = x(minsIndexes)
% Plot star over the mins.
hold on;
plot(minX, minValues, 'r*', 'MarkerSize', 10);
In the command window:
minValues =
0 -1.00 -1.00 -1.00 -1.00 -0.96
minX =
0 1.86 2.76 3.31 3.70 4.00
