Changing order of plot?

I'm trying to plot a set of data. This is my code:

clc
clear
close all

stat = importdata("static pressure.txt");
dir = importdata("direction.txt");
tot = importdata("total pressure.txt");

cp_cfd = (stat-tot)/(0.5*0.8*36.3^2);
plot(dir/0.1524,-cp_cfd,'r','.');

But, since direction.txt is not ordered for smallest to largest, the plot comes out like this (the plot function doesn't automatically order it):

I would like it to look like this (this is a scatter plot and I drew in a line in paint to show what I would like it to look like):

How would I do this?

Answer 1

[David Coventry]

You can likely sort the direction, and use the sorted index to reorder the y values.

See the documentation of sort for more information

https://www.mathworks.com/help/matlab/ref/sort.html

[x, I] = sort(dir/0.1524);
y = -cp_cfd(I);

plot(x,y,'r')