How do I plot the surface so its connecting the points rather that passing though them? (3D Plot)

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Harry Cornell
Harry Cornell 2020-4-22
回答： Ameer Hamza 2020-4-22
Hi there,
Im relatively new to Matlab so please bear in mind.
I want my plot (left image) too look similar to the reference plot (right image).
I have my data in an excel file and i have tried a 3D plot to replicate this. I've used the code help guidance to obtain the following image on the left however as you can see the surface isnt connecting the dots like the reference image has. In which case how do i do this? Any help is appreciated.
My code is as follows:
clc
clear all
dataset1 = xlsread('Optimum Parameters.xlsx','3D Plot Data','D5:F200');
rin = dataset1 (:,1);
Thick = dataset1 (:,2);
Temp = dataset1 (:,3);
figure
sf = fit([Thick,rin],Temp,'poly55');
plot(sf,[Thick,rin],Temp)
xlabel('Thickness, mm')
ylabel('r_i_n, mm')
zlabel('Temperature increase, °C')
Thank you
  2 个评论
Harry Cornell
Harry Cornell 2020-4-22
Hi Ameer,
Thank you for your reply. Im not sure how that plot was made. Im not even sure if I am meant to use the ploy function, it is just what I saw in one of the help files. So I could be completely wrong.
The data is relatively long but here it is. I have attached the excel file.

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Ameer Hamza
Ameer Hamza 2020-4-22
Without knowing the equation of the surface, it is quite difficult to recreate the result in the image. For example, you can try cubicinterp. It fits all the points, but still, it does not looks the same.
clc
clear all
dataset1 = xlsread('Optimum Parameters.xlsx','3D Plot Data','D5:F200');
rin = dataset1 (:,1);
Thick = dataset1 (:,2);
Temp = dataset1 (:,3);
figure
sf = fit([Thick,rin],Temp,'cubicinterp');
plot(sf,[Thick,rin],Temp)
xlabel('Thickness, mm')
ylabel('r_i_n, mm')
zlabel('Temperature increase, °C')
See if the equation of that surface is mentioned in that book.

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