sortrows "not enough input arguments"

Hello all,

Having difficulty using built-in function sortrows... I am attempting to sort a 2-column double array (var "x" below) by col 1 as follows:

x=sortrows(x,1);

Running this line of code returns the following error:

Error using matlab.internal.math.sortrowsParseInputs

Not enough input arguments.

Error in sortrows (line 60)

Notably, I have attempted running sortrows with matrices and other array types/sizes... all to no avail. Any help much appreciated.

[Stephen23]

In MATLAB R2021a matlab.internal.math.sortrowsHelper is called on lines 59 and 61. But not 60.

So you must have modified the function somehow, or be using another function. Please show the output of this command:

which sortrows -all

[Michael Diaz]

K>> which sortrows -all

C:\Program Files\MATLAB\R2021a\toolbox\matlab\datafun\sortrows.m

C:\Program Files\MATLAB\R2021a\toolbox\matlab\datatypes\categorical\@categorical\sortrows.m % Shadowed categorical method

C:\Program Files\MATLAB\R2021a\toolbox\matlab\datatypes\tabular\@tabular\sortrows.m % Shadowed tabular method

C:\Program Files\MATLAB\R2021a\toolbox\matlab\datatypes\duration\@duration\sortrows.m % Shadowed duration method

C:\Program Files\MATLAB\R2021a\toolbox\matlab\datatypes\datetime\@datetime\sortrows.m % Shadowed datetime method

C:\Program Files\MATLAB\R2021a\toolbox\matlab\datatypes\tabular\@timetable\sortrows.m % Shadowed timetable method

C:\Program Files\MATLAB\R2021a\toolbox\matlab\bigdata\@tall\sortrows.m % Shadowed tall method

C:\Program Files\MATLAB\R2021a\toolbox\shared\statslib\@dataset\sortrows.m % Shadowed dataset method

[Michael Diaz]

I am guessing I shadowed a built-in function somehow? I have a copy of sortrows in my "Current Folder" that is different from the path pasted above (C:\Program Files\MATLAB...) -- I am not sure if this might have anything to do with my current issue.

[Stephen23]

"I am guessing I shadowed a built-in function somehow?"

Most likely.

"I have a copy of sortrows in my "Current Folder" that is different from the path pasted above"

That would be it.

"I am not sure if this might have anything to do with my current issue."

It is the cause of this issue.

[Michael Diaz]

Update to all who run into a similar issue in the future -- I did indeed "shadow" the built-in function by having it copied (and possibly edited) into my working directory... deleting the function in my working directory and re-running the code did the trick.

Thanks!

Answer 1

[Image Analyst]

x = randi(99, 5, 2)

x = 5×2

15 86 84 4 59 24 61 78 42 33

x=sortrows(x,1)

x = 5×2

15 86 42 33 59 24 61 78 84 4

Seems to work fine. What did you do differently in the 59 prior lines of code?

[Michael Diaz]

Kindly see above -- I accidentally shadowed the built-in function!