Getting an error "Cannot call or index into a temporary array." (Code not written by me.)
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This *.m file is a simple 2D line plot which I did not write. it repeatdly loads a series of Excel files and generates a *.png file of the plot. The error occurs in line 3, there are red sguiggles before both instances of "(1)". I have png files for many of the files, so I know the code worked at some point in time. As you can guess, I am a total newb at MATLAB! Code below:
file1 = dlmread("Results MSEEL 7557.xls");
Grey7557 = file1(:,3);
Depth7557 = linspace(7557,(7557+size(Grey7557)(1)*0.0016402),size(Grey7557)(1));
plot(Grey7557,Depth7557,'+')
axis("ij")
xlabel("Greyscale")
ylabel("Depth(ft)"), there are red sigules before
print -dpng Plot7557.png -S1200,1800;
回答（1 个）
Star Strider
2020-9-11
If I understand the intent correctly, this should probably be:
Depth7557 = linspace(7557,(7557+size(Grey7557,1)*0.0016402),size(Grey7557,1));
such that:
size(Grey7557,1)
returns the row size of the Grey7557 vector. Since it appears to be a vector, numel would work as well, and could be more efficient.
.
4 个评论
Raymond McCleery
2020-9-11
@Star Strider, thanks for the quick reply.
I modified the code:
file1 = dlmread("Results MSEEL 7557.xls");
Grey7557 = file1(:,3);
Depth7557 = linspace(7557,(7557+size(Grey7557,1)*0.0016402),size(Grey7557,1));
plot(Grey7557,Depth7557,'+')
axis("ij")
xlabel("Greyscale")
ylabel("Depth(ft)"), there are red sigules before
print -dpng Plot7557_2.png -S1200,1800;
Now the code seems to have some other undesirable parts:
>> Read_Plot
Error: File: Read_Plot.m Line: 12 Column: 33
Indexing with parentheses '()' must appear as the last operation of a valid indexing expression.
>> Read_Plot_test
Error using dlmread (line 147)
Mismatch between file and format character vector.
Trouble reading 'Numeric' field from file (row number 1, field number 1) ==> Area Mean StdDev Mode Min
Max Slice\n
Error in Read_Plot_test (line 1)
file1 = dlmread("Results MSEEL 7557.xls");
The plot should look like this:
Star Strider
2020-9-11
The dlmread function is not appropriate for a .xls file. Instead, use xlsread or in more recent MATLAB versions, readtable or readmatrix.
Walter Roberson
2020-9-11
It looks to me as if they are probably space or tab delimited files rather than actual xls files. dlmread() might be usable, if you specify R (row) as 1 .
Raymond McCleery
2020-9-14
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