about assigning the values to a column vectors.

lets suppose i have 4 column vectors such as v1,v2,v3,v4

now what should i do to assign values to the elements of column v1 ( each element ) to that of vector v2.

the number of entries in both the coloumn are same.

same i want to do for v3 and v4.

and add the entries of v2 and v4 particulary for when the (v1 =~v3). the vectors here contains the numerical entries .

[Guillaume]

"lets suppose i have 4 column vectors such as v1,v2,v3,v4"

You've already gone wrong with your starting premise. You should never have numbered (or sequentially named) variables. If they're numbered it's a clear indication that they belong together in the same variable, in this case a 4 column matrix.

what should i do to assign values to the elements of column v1 ( each element ) to that of vector v2

What does assigning a value to another value actually mean? Please provide an example.

[Patel jaykumar Dipakbhai]

by assigining a value i mean,

let supose 2.5, 3, 4.5, 5 ,5.5, 6 ,7.7,.. are the elements of my column vector A and 100,200,300,400,500,600,700,.. are the elements of vector B

then assigining vaues with columns i mean for entry in vector A The value of it would be entry of vector B

such as =

2.5= 100

3 = 200

4.5 = 300

5 = 400

5.5 = 500

6 = 600

7.7 = 700.... and so on , also the total elments in each vector are same.

[Guillaume]

"The value of it". Please be precise with your wording what does it refer to? Given:

A = [2.5; 3; 4.5; 5; 5.5; 6; 7.7]
B = [100; 200; 300; 400; 500; 600; 700]

what result do you want (please use valid matlab syntax):

C = ???

[Patel jaykumar Dipakbhai]

dear sir, thankyou for your kind help, will be precise from now onwards with using words.

here as shown in the image EC,FC,FD,DE, are the different column vectors . and i want the addition of the elements of FC and FD, 'when the elements of EC and DE are equal'

the elements of EC have relation with FC and elements of DE have relation with FD.

therefore i was asking to assign the values to the coloumn vectors.. and add after the condition is met true( loop conditions) and those added values of would be added in the column vector 'FC'.

as you can see in the above code i have tried to get the output but i am not getting my result. kindly help if possible...

I apologize if i am harsh with using appropriate words this time too.

[madhan ravi]

Patel always post the code and the expected output so that the readers gets the grasp of your idea quickly.

Answer 1

[Guillaume]

As Madhan said, always post the code as text, not as pictures which we can't copy paste into matlab.

There is usually no need for table2array. Typically people use it because they don't know how to manipulate tables directly.

eq is exactly the same as ==. I suspect that you used it to try to work around some problem. It won't solve it.

If all you want to do is add the corresponding of elements of FD to FC when matching elements of |EC and DE are equal, then it's simply:

toadd = EC == DE;  %logical vector
FC(toadd) = FD(toadd) + FC(toadd);

Note that all these variables are extremely poorly named. It's very easy to mistype one for the other, introducing bugs in your code, and the variable names don't mean anything. Since all these variable appear to come from the same table data, you could simply manipulate the table directly:

toadd = round(data{:, 3}) == data{:, 1};
data{toadd, 2} = data{toadd, 2} + data{toadd, 4};