MATLAB 2022b removing spaces from strings in concatenation?

I just tried to plot this but the space after Nozzle Number is being removed?

for i=1:19
    plot(pressures_spray_angle,spray_angle(i,:),'-*','LineWidth',2,'DisplayName',strcat('Nozzle Number ',num2str(nozzle_numbers(i))));
end

Also I tried to concatenate with a + and that did not work.

Is this a MATLAB 2022b thing? If so, please name out the software engineer who implemented it and approved it for accountability purposes :D

[Stephen23]

"Is this a MATLAB 2022b thing?"

No, STRCAT has always trimmed trailing whitespace from character arrays, as the last example from this 2012 archive of the documentation shows:

https://web.archive.org/web/20120918044543/https://www.mathworks.com/help/matlab/ref/strcat.html

Every archived version of the documentation shows/explains this.

[Tahsin Emir Ersoy]

you are right on this one, my bad.

Answer 1

[Jonas]

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

use [] or horzcat please

tx1='hello ';
tx2='world ';
number=rand();
[tx1 tx2 num2str(number)]

ans = 'hello world 0.021847'

horzcat(tx1,tx2,num2str(number))

ans = 'hello world 0.021847'

strcat(tx1,tx2,num2str(number))

ans = 'helloworld0.021847'

using + is only suported for strings not character arrays:

"hello " + "world"

ans = "hello world"

class("hello " + "world")

ans = 'string'

class(tx1)

ans = 'char'

[Tahsin Emir Ersoy]

that makes sense, thanks very much indeed.

[Jonas]

happy to help. if you do not have any more question, please accept the answer

[Tahsin Emir Ersoy]

Just accepted, thanks again.