Getting an error "Cannot call or index into a temporary array." (Code not written by me.)

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;

Answer 1

[Star Strider]

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.

.

[Raymond McCleery]

@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]

The dlmread function is not appropriate for a .xls file. Instead, use xlsread or in more recent MATLAB versions, readtable or readmatrix.

[Walter Roberson]

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]

Thanks for the answers. The files say they are*.xls files but when I open them Excel gives a warning that the "file format and extension of <file name>.xls don't match. The file could be corrupted or unsafe...etc.", however they come up normally in Excel, so I assumed they were just and older version. Maybe they are not *.xls files.