A = z e r o s ( 3 , 4 ) {\textstyle A={\mathsf {zeros}}(3,4)} generates a 3 × 4 {\textstyle 3\times 4} matrix of zeros. A ( 3 , : ) = [ 1 2 3 4 ] {\textstyle A(3,:)=[1\,2\,3\,4]} changes the 3 {\textstyle 3} rd row of the matrix A {\textstyle A} to [ 1 2 3 4 ] {\textstyle [1\,2\,3\,4]} . The ’for’ loop assigns a value of 5 {\textstyle 5} to the entries represented by A ( 1 , 2 ) , A ( 2 , 3 ) {\textstyle A(1,2),A(2,3)} and A ( 3 , 4 ) {\textstyle A(3,4)} . Thus, the resulting matrix is [ 0 5 0 0 0 0 5 0 1 2 3 5 ] {\textstyle \color {blue}{\begin{bmatrix}0&5&0&0\\0&0&5&0\\1&2&3&5\\\end{bmatrix}}} .
generates a 
matrix of zeros. ![{\textstyle A(3,:)=[1\,2\,3\,4]}](https://wiki.ubc.ca/api/rest_v1/media/math/render/svg/052cf944e35dc16b524d730844e8262165b06fbf)
changes the 
rd row of the matrix 
to ![{\textstyle [1\,2\,3\,4]}](https://wiki.ubc.ca/api/rest_v1/media/math/render/svg/0f95facb7e724cb582a0b8fbd6972e2bd4b8f964)
. The ’for’ loop assigns a value of 
to the entries represented by 
and 
. Thus, the resulting matrix is 
.
