Too many input arguments for RMS - sudden issue

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Erik J
Erik J 2022-3-2
评论： Walter Roberson 2023-12-27
Suddenly, code that has long worked no longer does. Part of the code uses the rms function. The error I get is "too many input arguments." I have never gotten this error on this code before.
When I check the rms function by just creating a vector (e.g., x = 1:100; rms(x)) - I get the same error.
Does anyone know what could be going on?
Thank you.
  1 个评论
Chunru
Chunru 2022-3-3
try "which rms" to find out if rms has been redefined somewhere. Or "dbstop error" to debug the code.

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回答（1 个）

vidyesh
vidyesh 2023-12-27
编辑：vidyesh 2023-12-27
Hi Erik,
I understand that the 'rms' function is unexpectedly generating an "too many input arguments" error with an input that previously worked without issue. There are several potential causes for this behavior:
1) Variable Name Conflict: There might be a variable named 'rms' in the workspace, which could interfere with the function call. To check for this, you can use the command:
who rms
If a variable named 'rms' exists, rename it before attempting to use the 'rms' function again.
2) Function Overloading: A user-defined function named 'rms' may be present in the workspace and it could be expecting different inputs. To verify that the built-in 'rms' function is being called, use:
which -all rms
This will show you all the functions named 'rms' that MATLAB can find in the search path.
3) Path Issues: It's possible that directory changes have caused a custom function to override the built-in 'rms' function. To restore the MATLAB search path to its default state and clear any custom paths, execute the following commands:
restoredefaultpath
rehash toolboxcache
savepath
For more detailed information, you may refer to this MATLAB Answers page:
https://www.mathworks.com/matlabcentral/answers/96005-why-do-i-get-the-error-unrecognized-function-or-variable
Hope this answer helps.
  2 个评论
Stephen23
Stephen23 2023-12-27
编辑：Stephen23 2023-12-27
Ran in:
"Variable Name Conflict" leads to a completely different error message:
rms = pi;
x = 1:100;
rms(x)
Index exceeds the number of array elements. Index must not exceed 1.

rms appears to be both a function and a variable. If this is unintentional, use 'clear rms' to remove the variable 'rms' from the workspace.
Walter Roberson
Walter Roberson 2023-12-27
Unless the replacement variable just happened to be an anonymous function that did not accept inputs...

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