Saving data points as a row and column

I have a program that takes points from a file and give the answer for each input point. Keep in mind that is being done in a loop. I want to take those results points and store them in a file. But when I use Fid=fopen(file, w+), it keeps updating the points so not all of them saved in there. On top of that I have another str2double points that I wan to save to the same file in a different column. That would give me two column of data points for me to plot. Can anybody hel? Because of the for loop it's keep writing and updating. When I use 'a' or 'a+' it appends but does not update. I want it to write all the points each in different row like this: First Sec

1. 3

2. 4

3. 5

But because of the loop it only keep the last points in the file

For k=1:1:21

Txt=importdata(file.txt, %s)

T=sscanf(Txt{k})

Y=str2double(T)

Fid=fopen(file,w)

fprintf(fid, %s, Y)

But it just won't keep all 21 values of y

[Azzi Abdelmalek]

Post your loop

Answer 1

[Mini Me]

For k=1:1:21

Txt=importdata(file.txt, %s)

T=sscanf(Txt{k})

Y=str2double(T)

Fid=fopen(file,w+)

Fprintf(fid, %s, Y)

But it just won't keep all 21 values of y

[Jan]

There is no Fprintf() command in Matlab, because the upper/lowercase matters. The format string of '%s' and the file name require quotes. sscanf() works sufficiently with a format string also. There is no need to import the file repeatedly inside the loop. The doubles in Y cannot be stored in the file by fprintf('%s'), bit you need a numerical format specifier.

On first sight there are 11 serious errors in your code. This is not useful for answering your question. Please debug the code at first and post a well formatted copy in the original question, not as an answer. Thanks.

[Mini Me]

That I know I was just being sloppy. Just a vague idea how the program is

[Walter Roberson]

Are you hoping for a sloppy answer or a correct one?