Question about plotting, getting subvectors
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Hi,
I'm new to Matlab central, but not new to Matlab itself. I'm running a simulation which has an end results of two columns of values. I ususally plot these values using plot(1stcolumn,2ndcolumn). My question is: how do I plot only a small amount of these values? Like say 1stcolumn(40) to 1stcolumn(60)? I've tried exactly this in Matlab, but I am only getting an empty graph sheet (no errors are showing either):
plot(1stcolumn(40),2ndcolumn(40),1stcolumn(40),...
2ndcolumn(40)1stcolumn(40),2ndcolumn(40),...
1stcolumn(40),2ndcolumn(40))
What am I doing wrong?
RebSam
采纳的回答
Paulo Silva
2011-7-30
vector(1:40) %get all values from index 1 to 40
Your mistake is that you just plot the value at index 40 with your code vector(40)
更多回答（2 个）
Jan
2011-7-30
1 个投票
"1stcolumn", "2ndcolumn" etc are no valid Matlab symbols, because they start with a number. Are you sure that the posted code does not produce errors?!
1 个评论
Paulo Silva
2011-7-30
good catch, for some strange reason I didn't noticed that the variables started with numbers, too much trust on OP codes.
REBECCA
2011-8-1
0 个投票
1 个评论
Paulo Silva
2011-8-1
REBECCA and all that might read this, please do the effort of trying the code first before asking questions, that saves us time and we can use the extra time to help others.
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