Index exceeds the number of array elements.

2022 4 18
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更新时间：2022 4 18
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Hello,
I'm trying to create a topographic map, I keep getting a message in the comand window that says. Index exceeds the number of array elements. I needs some help making a topographic map for my class.
clf
disp('CTD_lat_lon.csv') % Display the file
table1 = readtable('CTD_lat_lon.csv') % creates a table from the data from the first OMG file
latitude = table2array(table1(:,2));
longitude = table2array(table1(:,3));
geoplot('latitude','longitude','-*')
geolimits([63.5 64],[-42 -40])
geobasemap topographic

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Voss
Voss 2022-4-18
Can you upload the file CTD_lat_lon.csv (using the button with the paperclip icon)?
Eddie Franco
Eddie Franco 2022-4-18
its already in there, uner current folders.
the cyclist
the cyclist 2022-4-18
编辑：the cyclist 2022-4-18
@_ meant could you upload the file here, for us to use for debugging your code. You can use the paperclip icon in the INSERT section of the toolbar. Also, it would be helpful for you to report the complete error message, and what line of code causes it.
Eddie Franco
Eddie Franco 2022-4-18
The line of code that causes the error starts with
geoplot('latitude','longitude','-*')
Here are the error messages.
Error using geoplot (line 71)
Expected lat to be one of these types:
double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64
I also get another error message for this section
table1 = readtable('CTD_lat_lon.csv')
Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. The original column headers are saved in the VariableDescriptions property.
Set 'VariableNamingRule' to 'preserve' to use the original column headers as table variable names.

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回答（1 个）

the cyclist
the cyclist 2022-4-18
Ran in:

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Ran in:
There are a couple issues with your code. First, MATLAB's algorithm to automatically detect the file delimiter seems to have gotten confused, so I set the explicitly. Also, the input file had some spurious whitespace characters that I got rid of.
More importantly, your enclosed the input arguments in quotes, which MATLAB just interprets as the string 'latitude' instead of the variable latitude. I fixed that up, too.
table1 = readtable('CTD_lat_lon.csv','delimiter',','); % creates a table from the data from the first OMG file
latitude = table2array(table1(:,2));
longitude = table2array(table1(:,3));
geoplot(latitude,longitude,'-*')
geolimits([63.5 64],[-42 -40])
geobasemap topographic

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Eddie Franco
Eddie Franco 2022-4-18
I really appreciate the advice, thank you. I' new to matlab so I make alot of easy mistakes still. Thank you! Thank you!

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