curve line like Excel

please how i can get like the excel curve

x = [-0.001997568 0.002377296 0.002564918 -0.0021569 -0.001997568]
y = [-0.001082305 -0.007057942 0.002240446 0.008950567 -0.001082305]

[dpb]

Matlab is sorely lacking in such enhancements...it would require building an interpolating functional manually; I don't know there's anything prepackaged to do such.

[Touts Touts]

I have found this code, but its does not work for me ?

%%plot 1
figure
x = [1 2 3 1.5];
y = [1 4 9 5];
scatter(x,y)
hold on
line(x,y)
xlim([0 4])
ylim([0 10])
%%plot 2
figure
sorted=sortrows([x' y']);
sorted_x = sorted(:,1);
sorted_y = sorted(:,2);
scatter(sorted_x,sorted_y)
hold on
line(sorted_x,sorted_y)
xlim([0 4])
ylim([0 10])
%%plot 3
figure
fitx=linspace(0,4,100);
fity = interp1(sorted_x,sorted_y,fitx,'spline');
scatter(sorted_x,sorted_y)
hold on
line(fitx,fity)
xlim([0 4])
ylim([0 10])

[dpb]

Don't know what you expected but it does what it was written to do...draws a line with some unordered points, rearranges the points in x-ascending order and plots, then smooths the graph with a spline.

Looks like it was just intended as a simple demonstration; wasn't purporting to solve any great problem.

It would take building a smoothing bounding surface in 2D through the polygon points to build a line such as that in the example posted; as noted, afaik there's not a trivial function prepackaged in ML to do such.

You might try to search on FileExchange and see if somebody has done something similar...

[Unai San Miguel]

I have found some links which may be useful:

https://blog.splitwise.com/2012/01/31/mystery-solved-the-secret-of-excel-curved-line-interpolation/

https://www.xlrotor.com/index.php/knowledge-center/files

https://answers.microsoft.com/en-us/office/forum/office_2007-excel/how-does-excel-plot-smooth-curves/c751e8ff-9f99-4ac7-a74a-fba41ac80300?msgId=5b59b6de-5099-48d1-b205-1b791ea2df05

http://www.excelution.at/linie-glaetten/

But any of these solutions will lead to uncontrolled curves, just the same as in Excel.