MATLAB Answers

Use data in an array for 'Plot' command

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LR on 13 May 2021
Commented: LR on 14 May 2021
I need to draw a shape using the 'Plot' command, the data is stored in an array called 'shape'. This is my attempt so far:
for i=1:1:length(shape(j,4,i))-1
plot([shape(j,4,i) shape(j,4,i+1)],[shape(j,5,i) shape(j,5,i+1)],'k');
hold on;
plot([shape(j,4,i))(length(shape(j,4,i)) shape(j,4,i)(1)],[shape(j,5,i)(length(shape(j,5,i))) shape(j,5,i)(1)],'k');
I receive this error: "Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters."
Is this the correct format to use to call data from an array because I cannot see any problems with the brackets?
Thank you

Answers (1)

VBBV on 13 May 2021
%if true
plot([shape(j,4,i) length(shape(j,4,i)) shape(j,4,i)(1)],[shape(j,5,i)(length(shape(j,5,i))) shape(j,5,i)(1)],'k');
Try now
LR on 14 May 2021
Which For loop should I place the 'plot' code in, I've tried i and j but neither worked.

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