peak addition/ arrary addition
2 views (last 30 days)
Show older comments
I have a question about the addition of peaks in the form of 2D arrays, say, each peak is a 400X2 array.
Peak 1:
P1x = [1500:0.01:1504]' % 400 points centered at 1502
P1Y = 5.*exp(-(1-x./1502).^2/0.3) % some function of x
similarly, peak2:
P2x = [1501.8:0.01:1505.8]' % 400 points centered at 1503.8
P2Y = 12.*exp(-(1-x./1503.8).^2/0.5) % some function of x
Peak 3:
P3x = [1505:0.01:1509]' % 400 points centered at 1507
P3Y = 17.*exp(-(1-x./1507).^2/0.8)
.....etc. How to do the peak addition if there is any overlap and store them in a 2D array, so X of the peak sum will be [1501:0.01:1508] ( not from 1500 to 1509); Y of the sum is just the addition of the peaks.
what if I have hundreds of peaks? Thanks
0 Comments
Accepted Answer
Iain
on 30 Aug 2013
Edited: Iain
on 30 Aug 2013
If all the peaks have the same parameterised formula
f = @(A,B,C,x)(A.*exp(-(1-x./B).^2./C);
for i = 1:numel(x)
y(i) = sum(f(A,B,C,x(i)));
end
Its not quick, but it will do the job for 100s of thousands of peaks. - You'll need to supply "x".
Alternatively, a lot quicker, if you use "bsxfun", and a bit of intelligence, you'll be able to get rid of the loop. - But you won't be able to handle quite so many peaks.
4 Comments
More Answers (0)
See Also
Categories
Find more on Logical in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!