what is error in this sobel function code

I edit the code in this format

I=imread('first palm.jpg'); subplot(1,2,1); imshow(I);title('first palm'); BW1=edge(I,'sobel'); BW2=edge(I,'canny'); subplot(1,2,2); imshow(BW1);title('sobel edge detector image'); figure,subplot(1,2,1);imshow(I);title('first palm'); subplot(1,2,2); imshow(BW2);title('canny edge detector image');

and this error "Error in Edges (line 4) BW1=edge(I,'sobel');" appear to me

[Jan]

Please format your code and explain any details about why you assume, that there is an error. E.g. a copy of the complete error message will reveal many information. Please add this by editing the question, not as comment or answer. Thanks.

Answer 1

[Image Analyst]

You forgot to post the error, but if you use the sobel option of edge, it takes a single threshold, not an array of two thresholds like you tried to do.