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Shobana Sinniah

The document shows examples of matrix multiplication in MATLAB. It defines vectors x and y, and tries to multiply them using A=x*y, which results in an error as their inner dimensions do not agree. It then uses meshgrid to create matrices new_x and new_y from x and y, but multiplying new_x*new_y again results in an error. Finally, it correctly element-wise multiplies new_x and new_y using new_x.*new_y to produce the expected output without errors.

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Commandwindow1 >> clear >> x=1:5 x = 1 2 3 4 5 >> y=1:3 y = 1 2 3 >> A =x*y ??? Error using==> mtimes Innermatrix dimensionsmustagree. >> [new_x,new_y]=meshgrid(x,y) new_x = 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5
new_y= 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 >> B=new_x*new_y ??? Error using==> mtimes Innermatrix dimensionsmustagree. >> B=new_x.*new_y B = 1 2 3 4 5 2 4 6 8 10 3 6 9 12 15 >>

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Comand window1

  • 1. Commandwindow1 >> clear >> x=1:5 x = 1 2 3 4 5 >> y=1:3 y = 1 2 3 >> A =x*y ??? Error using==> mtimes Innermatrix dimensionsmustagree. >> [new_x,new_y]=meshgrid(x,y) new_x = 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5
  • 2. new_y= 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 >> B=new_x*new_y ??? Error using==> mtimes Innermatrix dimensionsmustagree. >> B=new_x.*new_y B = 1 2 3 4 5 2 4 6 8 10 3 6 9 12 15 >>