peak of a graph

I have a graph. How can I find the peak value and location of peak point without using for loop?

Answer 1

[Image Analyst]

Assuming you have the actual data values that were plotted and aren't just stuck trying to digitize some printed figure out of a published article, try this:

[peakvalue, peakIndex] = max(yourData);

Answer 2

[Thorsten]

help findpeaks