Why not adding space between words

strcat('Scale Factor = ',num2str(table2array(T(min(find(find_groups==k)),'scalefactor'))))

and the output is like:

 'Scale Factor =0.65'

I need to add the space between = and 0.65. Using above code does not add the space. Any idea/solution?

[Guillaume]

Please note in Walter's answer how he simplified the horror that is:

table2array(T(min(find(find_groups==k)),'scalefactor')))

to

T.scalefactor(find(find_groups==k,1)))

Use proper table indexing,

table2array(Atable(rows, 'variablename'))   %() indexing on a table returns a table

is simply

Atable.variablename(rows)   %. indexing returns the content of the table
%or
Atable{rows, 'variablename'} % {} indexing returns the content of the table

and

min(find(something))

is simply

find(something, 1)  %get the first element only

Answer 1

[Image Analyst]

Try fprintf()

theNumber = table2array(T(min(find(find_groups==k)),'scalefactor'));    % Whatever...but don't use num2str()
fprintf('Scale Factor = %.2f.\n',  theNumber);

[Zeynab Mousavikhamene]

Thanks but I dont want to print it. I want to use it as plot x axis title.

[Image Analyst]

theNumber = table2array(T(min(find(find_groups==k)),'scalefactor'));    % Whatever...but don't use num2str()
xLabelString = sprintf('Scale Factor = %.2f.\n',  theNumber);
xlabel(xLabelString, 'FontSize', 20);

[Allen]

Though sprintf is a much better approach, you can also use [] or horzcat to concatenate pretty much any like class of variables; in this case character vectors.

xLabelString = ['Scale Factor = ',num2str(table2array(T(min(find(find_groups==k)),'scalefactor')))];

[Zeynab Mousavikhamene]

Thank you. And if it was string array, how could I add no limitation to the resulting string? for example

xLabelString = sprintf('Name = %.2s',  theName);

this line says report the string until two characters. so if the name is "Hello" it would report "He". How can I say to report the whole "Hello" not part of it?

Ps. Hello is an example and the length of name might change in each iteration so I need a general method.

[Guillaume]

If you don't put any restriction on the format length, then matlab won't truncate the input. So

sprintf('Name = %s', theName)   %no limit to 2 characters

would work.

If you want a minimum field width of 2 characters but more if required, then

sprintf('Name = %2s', theName)   %No . in the format string. Minimum field width of 2, padding with spaces if required

[Zeynab Mousavikhamene]

Thank you @Image Analyst and @Allen and @Guillaume. If you post separately I can vote for your posts.

Answer 2

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/strcat.html

For character array inputs, strcat removes trailing ASCII white-space characters: space, tab, vertical tab, newline, carriage return, and form feed. For cell and string array inputs, strcat does not remove trailing white space.

[Zeynab Mousavikhamene]

so what would you suggest to do?

[Walter Roberson]

 strcat({'Scale Factor = '}, num2str(T.scalefactor(find(find_groups==k,1))))

Answer 3

[Steven Lord]

If you're using a release that supports string arrays, you can simplify this a bit if you trust MATLAB to do "something reasonable" when combining your text and numeric data.

x = 0.65;
S = "Name = " + x

[Zeynab Mousavikhamene]

I am using 2018 version.