MATLAB: Invalid first data argument

plot

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.

Best Answer

'--' 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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MATLAB: Plot double y axis, 3 curves

If your data are column vector

[ax,h1,h2]=plotyy(x1,y1,x2,[y2 y3])
set(h1,'linestyle','none','marker','o','color','b')
set(h2(1),'linestyle','-','marker','o','color','r')
set(h2(2),'linestyle','-','marker','o','color','k')

MATLAB: Invalid first data argument

All of the name-value pairs must come after all other input arguments.

plot3(___,Name,Value)

The first syntax is accepted because it follows these supported syntaxes

plot3(X1,Y1,Z1,...,Xn,Yn,Zn)

plot3(X1,Y1,Z1,LineSpec1,...,Xn,Yn,Zn,LineSpecn)

Specify different name-value properties after plotting by making changes to the handles.

h = plot3(xV, yV, zV, 'b.', xT, yT, zT, 'r.', ...
    a(1), a(2), a(3), 'mx', b(1), b(2), b(3), 'mx'); 
set(h(3:4), 'LineWidth', 2)

Best Answer

Related Solutions

MATLAB: Plot double y axis, 3 curves

MATLAB: Invalid first data argument

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