how to split the numbers into three different colums in fprint command ?

How to split the numbers into three different colums with 6 places after the decimal point in fprint command such that the next number written will be in a next line as well?

This is how I am getting

GradVec = 1.0000000.6593560.000000    % -- I want to split these at the 6th place after the decimal using fprintf
diary ('F:\new_code\gradation.txt');
fprintf('%6.6f',GradVec);
diary off

[Walter Roberson]

GradVec = 1.0000000.6593560.000000

It is an error to have more than one decimal point character in a numeric literal.

Do you have text in that format? If so are you trying to read text in that format from a file? It would be quite uncommon to have text defined in that format: it would be far more common for there to be fixed width fields. (Well, unless the text was written by poorly planned C code.)

[Adeline War]

@Walter Roberson Assume that value is given as

GradVec = [x(1) x(2) x(3)]

such that x(1) = 1.0

x(2) = 0.6

x(3) = 0.9

but when i fprint it on text

I get it as

1.00.60.9

How do i fix this?

Answer 1

[Walter Roberson]

When you use an fprintf() format and pass in more values than there are % items inside the format, the format gets reused from the beginning exactly as is. So if you use a '%.6f' format and pass in three items, you have effectively used repmat('%.6f', 1, 3) which would be like '%.6f%.6f%.6f' . Notice there are not spaces in that format! When you use fprintf() like this, it does not automatically add spaces.

So... use '%.6f %.6f %.6f\n' as your format.

[Adeline War]

@Walter Roberson Something new I learned today. Thank you so much