How to add array of data into a variable?says i wanna loop for 4times

N=4;
for i=1:N
    myArray(i) = [i+1 i+2];
end

Answer 1

[Star Strider]

You need to add a second dimension to ‘myArray’ to so what you want:

N=4;
for i=1:N
    myArray(i,:) = [i+1 i+2];
end

[Fatefly Yip]

Star Strider, i still have a problem at output...it gives me only LAST value calculated, and from iteration 1 to 4 all the same value. Actually, instead of [i+1 i+2],i have some quite complex maths operations done before inserting into [],says x=i+1,y=i+2 (just to make it simple)

N=4;
for i=1:N
    myArray(i,:) = [some maths operations];
end

[Walter Roberson]

>> N=4;
for i=1:N
    myArray(i,:) = [i+1 i+2];
end
>> myArray
myArray =
     2     3
     3     4
     4     5
     5     6

Looks to me as if it is working.

[Fatefly Yip]

really thanks...my bad,i found my mistakes just now,it is fixed...btw how can i loop "for loop" for 10 times with an increment of 2.

[Walter Roberson]

for i = 1 : 2 : 20

That would be 10 times with an increment of 2.

[Fatefly Yip]

thanks,never think it would be adding only ": 2" ...it is quite different from C programming...you are really helpful,thank you again :)

[Walter Roberson]

The C equivalent would be

for( i=1; i<=20; i+=2 )

The MATLAB is just rearranging that with a minor syntax difference.

[Star Strider]

@Fatefly Yip — Our pleasure!

@Walter — Thank you.