problem with name=value syntax

the release notes for R2021a have name=value syntax.

I try it but it isn't working for me.

Error using experimental.mfetterman.MonteCarloStudy.testFunc>calcJ

Too many input arguments.

Error in experimental.mfetterman.MonteCarloStudy.testFunc (line 3)

calcJ(A=ark,B=bark);

ark=randn(5,3);
bark=randn(6,2);
calcJ(A=ark,B=bark);
function calcJ(A,B)
fprintf('rank A:%d\n',rank(A));
fprintf('rank B:%d\n',rank(B));
end

[xingxingcui]

I think the way you wrote the call should be supported！there is no doubt in python and C++ languages

Answer 1

[Steven Lord]

That syntax is intended as a way to specify name-value pair arguments. So instead of:

plot(1:10, 1:10, 'Marker', 'o', 'LineStyle', ':')

you could write:

plot(1:10, 1:10, Marker = 'o', LineStyle = ':')

Your example does not use name-value pair arguments at all. What you wrote is:

calcJ(A=ark,B=bark); % equivalent to
calcJ('A', ark, 'B', bark);

Your calcJ function does not accept four inputs. It accepts two.

[Matt Fetterman]

OK thanks is there a "right" way to do it like I wanted.

[Steven Lord]

Either get rid of the names in your call:

ark=randn(5,3);
bark=randn(6,2);
calcJ(ark,bark);
function calcJ(A,B)

or modify your function so it accepts name-value pairs. The arguments keyword or inputParser will help you if you choose this approach.

[xingxingcui]

Is it possible to enhance the new syntax "Name=Value Syntax" introduced in version R2021a?

https://www.mathworks.com/matlabcentral/answers/888872-is-it-possible-to-enhance-the-new-syntax-name-value-syntax-introduced-in-version-r2021a?s_tid=srchtitle

It would be nice to have enhancements in future versions！