if i assign 4 position(x,y) can i make a point and line to connect it together like freehand drawing

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Suree yatho 2012-1-26

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采纳的回答： Walter Roberson

if i assign 4 position(x,y) can i make a point and line to connect it together like freehand drawing ? and i can find the area of this ?

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Walter Roberson 2012-1-26

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X = [x1 x2 x3 x4 x1];
Y = [y1 y2 y3 y4 y1];
plot(X,Y)
polyarea(X,Y)

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