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If Statement in a table

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Noush
Noush 2021-11-2
评论： Noush 2021-11-3
I have the table K below and would like to use an if statement that replaces the zeros in the fifth column with 300, everytime that the row one below contains a "Ja".
My if statement looks like this:
if K(i,2:5)=="Ja"
K(i-1,6) = 300
end
This is the error I get: Index in position 1 is invalid. Array indices must be positive integers or logical values.
What do I need to change to access the correct data?
Thank you for your help!

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回答（1 个）

Cris LaPierre
Cris LaPierre 2021-11-2
Ran in:
Have you defined i? If not, it is sqrt(-1).
There error means i is either a decimal or negative number.
A=1:3;
% Works
A(2)
ans = 2
% doesn't work
A(1.5)
Array indices must be positive integers or logical values.
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Cris LaPierre
Cris LaPierre 2021-11-3
When indexing a table, paretheses return a table while curly braces return an array. You need to use curly braces to extract the value from the table.
You can read more about accessing data in tables here.
Noush
Noush 2021-11-3
thank you, this fixed my problem :)

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