Extracting SubmatricesTake is useful to extract a submatrix. Extracting submatrices. In[1]:=  |
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This extracts the submatrix from  to  . In[3]:=  |
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This extracts the submatrix of rows 1 to 3. In[4]:=  |
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This extracts the submatrix of columns 2 to 4. In[5]:=  |
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You can use negative indices to count from the end. This returns the matrix with the first and last columns dropped. In[6]:=  |
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