how to find time elapsed to execute the part of a program

i have written the code to acquire data from a data acquisition card , i want know the time taken at each stages to acquire data from one pixel. Eg.- time taken to initialize the channel - time taken to address the channel -time take to read the pixel, -time taken to display the image and i am using USB DAQ, sotime taken by an USB cable for transmission

Note:i tried using tic , toc and could not get proper elapsed time.

If any one have any idea regarding this , please help me

Answer 1

[Sachin Ganjare]

Try cputime function instead.

Also tic & toc will provide correct results if no other applications are running simulataneousely on your machine.

[Sachin Ganjare]

Also refer below link for improving results with tic& toc functions:

http://www.mathworks.in/company/newsletters/articles/improvements-to-tic-and-toc-functions-for-measuring-absolute-elapsed-time-performance-in-matlab.html

Hope it helps!!!

[MANJUNATH]

using tic i am getting some recursion error , saying it has reached the maximum limit,use set(0,'Recursionlimit ',N), even after the error is not corrected , i took N=500

[Sachin Ganjare]

Can you Can you elaborate more or paste code?

[Sachin Ganjare]

Refer link below:

http://www.mathworks.com/matlabcentral/newsreader/view_thread/316073