How do I turn an image jpg image into a matrix using the 'imread' command? and image analysis

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I know that I should use the `imread` command but I don't know how to retrieve an image from a particular file do I have to import it first? I did that and used the following:
>> M = imread(130510_120,jpg)
M = imread(130510_120,jpg)
Error: The input character is not valid in MATLAB statements or
Or do put the exact file location:
>> M = imread(C:\Users\bostock_h\Documents\Images\130510_120, jpg) M = imread(C:\Users\bostock_h\Documents\Images\130510_120, jpg) | Error: Unexpected MATLAB operator.
Or is there something else I'm doing wrong?
Also how do I make the resulting matrix into just n*m matrix which just gives the intensity of the elements without colour.

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Azzi Abdelmalek
Azzi Abdelmalek 2013년 6월 21일
M = imread('C:\Users\bostock_h\Documents\Images\130510_120.jpg')

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