Parsing certain indexs in array

m j
2016 9 7
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更新时间：2016 9 7
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So I have a 104X800 array . I need to plot only odd columns. then I need to have columns between 100-300 plotted, and not plot columns 1-100 and 300-400 example: say row 70 and only look at all odd columns.
I know I can exclude the last 100 columns with "end-100" and only plot odd columns with "1:2", but im having trouble with excluding beginning?? plot(data(70,1:2:end-100)');

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