Invalid first data argument

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Kiran Sagar 2016-4-7

评论： Image Analyst 2016-4-8

The following code:

plot(x,y,'Marker','*','Color','r',x2,y2,'Marker','--','Color','b')

generates this error: "Invalid first data argument".

here x, y and x2, y2 are arrays of same size.

Kiran Sagar 2016-4-7

x = [1 2 3] ;
y = 2*x ;
x2 = x ;
y2 = x ;

Image Analyst 2016-4-8

Doesn't matter now. I told you how to fix it below.

Image Analyst 2016-4-7

编辑：Image Analyst 2016-4-7

'--' is not a valid choice for 'Marker'. Use a valid marker. See the help for a list of them.

Try this:

plot(x,y,'r*-', x2,y2,'bd-');

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