how can i obtain this ?

i would like to use the command reshape to convert a vector v=11:99 to a matrix (9x9), how can i do this, can anyone help me ?

Answer 1

[Birdman]

You can not do it when v=11:99.

If you want to convert to 9x9 matrix, then you need to have 81 elements in your vector, with this you have 89. If you define it as v=11:91, then the following command will do what you want.

v=reshape(v,9,9)

[diadalina]

thank you Mr,cvklpstunc, for your answer.

[Birdman]

You are welcome, if it is helpful, you can accept the answer.

[diadalina]

have you another way to create this matrix please ?

[Birdman]

As I said before, 89 is a prime number and the only way to reshape it is either 89x1 or 1x89 vector. There is no other way.

[diadalina]

i want a way without using the loop for .

[Birdman]

Okay, you do not need for loop anyway, but you have 89 elements, either change it or you can not do anything with it.

[diadalina]

i can do it like this, A=[11:19;21:29;31:39;41:49;51:59;61:69;71:79;81:89;91:99], but i want a way more easier than this.

[Birdman]

But you skip 20,30,40,...,90 in this case

[diadalina]

no, that is the result , that i want, i have this way also: l=11:19; A=[l;l+10;l+20;l+30;l+40;l+50;l+60;l+70;l+80]; but i think , there is another way more easier than this.

[Birdman]

But v=11:99 includes 20,30,40,...,90 so you need to know what you ask.

[diadalina]

tha is the result, that i had wanted. A =

    11    12    13    14    15    16    17    18    19
    21    22    23    24    25    26    27    28    29
    31    32    33    34    35    36    37    38    39
    41    42    43    44    45    46    47    48    49
    51    52    53    54    55    56    57    58    59
    61    62    63    64    65    66    67    68    69
    71    72    73    74    75    76    77    78    79
    81    82    83    84    85    86    87    88    89
    91    92    93    94    95    96    97    98    99

[Birdman]

v=11:99;
IND=find(mod(v,10)==0);
v(IND)=[];
v=reshape(v,9,9)

[diadalina]

that's exactly , what i want, thank you very much.

Answer 2

[KL]

Simpler with just one line,

 bsxfun(@plus,1:9,(10:10:90).')

[diadalina]

thank you Mr,Kl for your answer.