matlab能用applyhatch畫出斜線填充的直方圖，但是卻不是無損的，這樣子的圖沒辦法放進論文裏面呀

applyhatch.m function applyhatch(h,patterns,colorlist) %APPLYHATCH Apply hatched patterns to a figure %  APPLYHATCH(H,PATTERNS) creates a new figure from the figure H by %  replacing distinct colors i

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