# how to multiply a curve (in a plot) by -1, if you do not have the original data? (I only have the plotted data.)

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Zeynep Ertekin 2022년 4월 25일
댓글: Zeynep Ertekin 2022년 4월 25일
Hey there!
I have a fig file, and I have multiple curves in it. I would like to obtain the exact curves, above the x-axis, in positive sense. I lost the original data, and I would like to multiply my data which are below the x-axis by "-1". If I had the original data, it would be quiet easy. However, its close to impossible for me to find out the orginal data. Any help would be more than appreciated. ((I only have the plotted data.))

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### 답변(2개)

Bruno Luong 2022년 4월 25일
Plot your figure, you can then retrieve the data with
x = get(findobj(gcf,'Type','line'), 'xdata')
y = get(findobj(gcf,'Type','line'), 'ydata')
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Zeynep Ertekin 2022년 4월 25일
can not acess matlab right now :( thanks for the answer!

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KSSV 2022년 4월 25일

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