执行八度程序时出现未定义的错误

Question

While executing the plotdata file in octave I'm getting the following error:

plotData error: 'x' undefined near line 7 column 6 error: called from plotData at line 7 column 1 plotData error: 'y' undefined near line 7 column 6 error: called from plotData at line 7 column 1

My code:

function plotData(x, y)

figure;

plot(x,y,'rx','MarkerSize',10);

ylabel('Profit in $10,000s');

xlabel('Population of city in 10,000s');

end

Answer 1

plotData expects ax and y value to be provided when running.

if you press the run button on the GUI you aren't giving it an e, y value.

Likewise if you run as 'plotData' in the console window, you aren't giving an x,y value

In both cases, no x,y value means that x and y variables have not been defined in the function and so the error occurs.

If you ran as:

plotData(10,20)

You would not have the error occur as ax,y value is being provided.