I am trying to create a scatter plot of: z = ( sin(xy) )2 , where x and y are both independent variables and each point is shown as a square with a defined color (based on it's value). Whenever I attempt to run the code I get the "Invalid first argument" error and it directs me to line 14: (plot(x,y,'s','c')). I honestly have no idea what this means. I have been using MATLAB for only a few months now so practically everything is still pretty new to me. Also, I am supposed to use a for loop to plot each point one-by-one.
if true x = -3:0.1:3; y = -3:0.1:3; z = (sin(x.*y)).^2; for i = 1:length(z) if z(i) < 0.1 plot(x,y,'s','b'); elseif z(i) > 0.1 && z(i) < 0.5 plot(x,y,'s','c') elseif z(i) > 0.5 && z(i) < 0.75 plot(x,y,'s','g') elseif z(i) > 0.75 && z(i) < 0.95 plot(x,y,'s','r') else plot(x,y,'s','b') end endend
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