How to create a loop on matrix

Assuming you have a 4x10 matrix. How do you create a loop from the 2nd column of the matrix to the 10th column.

Answer 1

[hosein Javan]

for example suppose we want to multiply each column by its coulmn number:

A =[
    92    99     1     8    15    67    74    51    58    40
    98    80     7    14    16    73    55    57    64    41
     4    81    88    20    22    54    56    63    70    47
    85    87    19    21     3    60    62    69    71    28
    ]
for it=2:10
    A(:,it) = A(:,it)*it;
end

A

A =

92 198 3 32 75 402 518 408 522 400

98 160 21 56 80 438 385 456 576 410

4 162 264 80 110 324 392 504 630 470

85 174 57 84 15 360 434 552 639 280

[Vincent Ogonda]

Do you have any idea how to update a vector using equation of a straight line X = [380 250 220 200] Update vector X using X = Cx + b and plot the results

[hosein Javan]

if I understant correctly.

C=1; B=2;
X = [380 250 220 200]
Y = C*X+B
plot(X,Y)