Parsing certain indexs in array

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)');

[Walter Roberson]

plot( data(70, 101:2:300) )

??