How to avoid the mistake plot if one x value corresponding to two or more y values?

Dear all,

I am ploting the figures but there is a problem that I am encountering. I don't know how to solve it. Hope anyone can give me some tips. Appreciate.

wrong

correct

Answer 1

[the cyclist]

If the density of your points is high enough, you could consider plotting only the markers, and not the connecting lines, e.g.

plot(x,y,'.')

If that doesn't work, do you have a third variable that indicates the proper order to connect the points? If so, then sort x and y by that variable. If not, I don't know how one could know which points to connect.

[kimy]

Thanks. In fact, I need the solid line instead of points plot. I uploaded my data here. Like you said, the third variable could be the order of each line. I do not know how to solve it. But I think if I use Origin to plot the figure by spline or B-spline, it could be solved. However, I'd better to use the Matlab format.

[the cyclist]

I don't understand what you mean by "the third variable could be the order of each line". Do you mean your variable VarName3? Can you infer the variable ordering from it?