parquetwrite: 'VariableNames' is not a recognized parameter

2025 10 17
1 个回答
更新时间：2025 10 21
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0 个投票

I'm using parquetwrite and Matlab 2024a. I'm trying to use the VariableNames optional input but I'm getting an error message saying: 'VariableNames' is not a recognized parameter.
Why am I getting this error? In the help documentation it says VariableNames was added to parquetwrite starting in R2024a. I'm running version 24.1.0.2578822 (R2024a) Update 2.

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Stephen23
Stephen23 2025-10-17
@David: please show us the output of these commands:
version
which parquetwrite -all
David
David 2025-10-17
>> version
ans =
'24.1.0.2578822 (R2024a) Update 2'
>> which parquetwrite -all
C:\Program Files\MATLAB\R2024a\toolbox\matlab\io\parquet\parquetwrite.m
Stephen23
Stephen23 2025-10-17
Please show the complete error message. This means all of the red text.
David
David 2025-10-17
Error using parquetwrite (line 188)
'VariableNames' is not a recognized parameter. For a list of valid name-value pair arguments, see the
documentation for this function.
Stephen23
Stephen23 2025-10-17
How are you calling parquetwrite: from a script or from the command-line ?
David
David 2025-10-17
I'm running from the command line.
For example, here's the output if I take the parquetwrite documentation example and add a VariableNames input:
>> T = readtable('outages.csv');
>> parquetwrite('outagesDefault.parquet',T,'VariableNames',T.Properties.VariableNames)
Error using parquetwrite (line 188)
'VariableNames' is not a recognized parameter. For a list of valid name-value pair arguments, see the
documentation for this function.

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回答（1 个）

Harald
Harald 2025-10-21

0 个投票

Hi,
I can reproduce the problem in R2024a. The code works fine in R2024b.
Workaround for R2024a: In your example, there should not be a need to specify VariableNames since according to the documentation, they will be derived from the input table anyway. If in other settings you need different variable names, I'd suggest to change the VariableNames of the input table (or a copy of it):
T = readtable('outages.csv');
T2 = T;
T2.Properties.VariableNames = newNames;
parquetwrite('outagesDefault.parquet',T2)
Best wishes,
Harald

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提问:

David
David
2025-10-17

回答：

Harald
Harald
2025-10-21

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