filename input into function

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rigel jaquish
rigel jaquish 2018-3-3
评论： luis suarez 2019-9-22
Really basic question, I have just started using MatLab. I have a function that pulls specific columns out of arrays that could be in any of four data files I am working with. Thus, my goal is to input a filename, have the function load the file, and then return the specific columns. Here is my current function:
function [tlat, trate] = lss_rr(filename)
G = load(filename)
m = G(:,3)
t = G(:,4)
But when I input a filename, the name returns as an undefined variable.

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回答（2 个）

Walter Roberson
Walter Roberson 2018-3-3
[TL, TR] = lss_rr('YourFile.txt');
Change YourFile.txt to the name of your file.
Do not try to use [TL, TR] = lss_rr(YourFile.txt); as that will try to evaluate YourFile as a variable.
luis suarez
luis suarez 2019-9-20
When i type this command in matlab
function power_flow(filename)
Where filename is a .txt file
It says undefined variable. Can somebody help me please.
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Walter Roberson
Walter Roberson 2019-9-20
power_flow('NameOfYourTextFileGoesHere.txt')
luis suarez
luis suarez 2019-9-22
Thank you very munch Mr walter Roberson it works now.

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