Passing a file by function

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SHAMA NOREEN
SHAMA NOREEN 2022-4-28
回答： Walter Roberson 2022-4-28
I am trying to send a file by function. I have two functions. The contents are as follows :
%%%SNR.m %%%%
%main
clear all
clc
noise_vec=0.5;
power_subch=[1 1 1 1 1 1 1 1 1 1 ];
H_k=randn(1,10);
Nof_Subcarriers=10;
aver_power=1;
sFileName = 'new.txt';
fid = fopen(sFileName,'wt');
gSNR=Gav(noise_vec, power_subch,aver_power, H_k,Nof_Subcarriers,fid)
fprintf(fid,'%f\n',gSNR);
func2(sFileName);
In this file I am calculating a value gSNR storing it and passing it to another file called func2.m
function func2(filenames)
headerLength=1;
numColumns=1;
fid = fopen(filenames ,'wt');
data = textscan(fid, repmat('%f',1,numColumns), 'headerlines', headerLength);
end
However there are are errors such as unable to read any data from file. TEXTSCAN might not have read access.
error in line : data = textscan(fid, repmat('%f',1,numColumns), 'headerlines', headerLength);
and in line : func2(sFileName);
I am not sure how to address these errors, have tried a lot.

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回答（1 个）

Walter Roberson
Walter Roberson 2022-4-28
fid = fopen(filenames ,'wt');
You opened the file for writing, but you immediately try to read it.
Note that you fail to close the file after.

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