Keep getting error message

2 次查看（过去 30 天）
Matthew Covington
回答： Walter Roberson 2019-3-4
Above is the pompt we are to follow to get the correct output, using fopen to get the data from a different file.
%*****CONSTANT*****
NUM_MONTHS = 12;
FIRST_YEAR = 2013;
LAST_YEAR = 2016;
%*****INPUT*****
month = 1:NUM_MONTHS;
year = FIRST_YEAR:LAST_YEAR;
% read data file
FID = fopen('lake_powell.txt','r');
lake_powell(month,year) = fscanf(FID, '%f', 1);
fclose(FID);
%{
Unable to perform assignment because the indices on the left side are not compatible
with the size of the right side.
Error in assign06b (line 22)
lake_powell(month,year) = fscanf(FID, '%f', 1);
%}
Above is the code I currently have, followed by the error message. I don't understand what I am doing wrong, could someone please explain and put me on the right track?

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回答（1 个）

Walter Roberson
Walter Roberson 2019-3-4
If the file is empty or does not start with a number, then fscanf() would return empty, and empty cannot be stored in a particular location.
Note: It is unlikely that you want to keep reading from the same location in the file. You probably do not want the fopen / fclose to be inside the loops.

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