generate a surface plot

2017 10 23
1 个回答
更新时间：2017 11 3
3 次查看（30 天）

0 个投票

*Check this below code to generate a surface plot. It's showing an error.*
t_res = 0.2;
c_angle = 360/30;
iact = 0.1;
V = 12;
p = 1;
%%fprintf('Slno\t\t Time\t\t Angle(degree)\t\t Current\t\t delta_i\t\t Torque\t\t Fluxlinkage\t\t L_obt\n');
for p=1:5,
Time = p*t_res;
Angle = Time*c_angle/2;
if (p == 1)
delt_i = 0;
else
delt_i = 0.5* t_res* V /L_obt;
end
iact = iact+delt_i;
[~, ~, raw] = xlsread('F:\Pradeep\Matlab\data1.xlsx','Sheet3','A2:D11');
data = reshape([raw{:}],size(raw));
Current = data(:,1);
Angle1 = data(:,2);
Torque = data(:,3);
Fluxlinkage = data(:,4);
F = scatteredInterpolant(Current,Angle1,Fluxlinkage);
Fluxlinkage = F(iact,Angle);
L_obt = Fluxlinkage/iact;
F = scatteredInterpolant(Current,Angle1,Torque);
Torque = F(iact,Angle);
Table = [p' Time' Angle' iact' delt_i' abs(Torque)' Fluxlinkage' L_obt'];
fprintf('%d\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\n', Table');
end
p=p+1;
plot3(Time,iact,Torque);

6 个评论
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Rik
Rik 2017-10-24
You attached a .txt, while your code loads .xlsx. Also, your steps to convert a cell to a matrix are a bit odd. Why not use the first output from xlsread, or even cell2mat? And if you want to create a surface plot, why use plot3 instead of surf?
Pradeepta Sahu
Pradeepta Sahu 2017-10-25
Copy the .txt file in .xlsx format and check it. I couldn't upload .xlsx file so i've copied it to .txt file. I want to make with respect to time.
KSSV
KSSV 2017-10-25
It is your duty to copy and attach.....here no one does what you demand...be careful while commenting or asking a question.
Pradeepta Sahu
Pradeepta Sahu 2017-10-25
编辑：Pradeepta Sahu 2017-10-25
The file format of .xlsx is unsupoorted to attach.
KSSV
KSSV 2017-10-25
There are ways to attach....can be zipped and attached.
Pradeepta Sahu
Pradeepta Sahu 2017-10-25
Thanks. attached.

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回答（1 个）

KSSV
KSSV 2017-10-25

0 个投票

data = [0.1 1 2.3 0.5
3 2 3.4 0.86
4 3 2.7 0.8739
5 4 4.5 0.4382
6 5 3.4 0.8234
7 6 5.5 0.53823
8 7 4.3 0.7482
9 8 4 0.3439
10 9 3.5 0.2593
11 10 2.4 0.2432];
c = data(:,1) ;
theta = data(:,2) ;
tor = data(:,3) ;
flux = data(:,4) ;
[C,T] = meshgrid(c,theta) ;
F = scatteredInterpolant(c,theta,tor) ;
Tor = F(C,T) ;
figure
surf(C,T,Tor) ;
title('surface plot of Torque')

10 个评论
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Pradeepta Sahu
Pradeepta Sahu 2017-10-25
编辑：Pradeepta Sahu 2017-10-25
Where is the time variable? Check my code properly. It involves time variable and I 'm trying to plot a surface in time, current and torque.
KSSV
KSSV 2017-10-25
Check my code properly.: Don't be demanding...remember you are asking for help here.
Where is time? First tell me where is time in your attached text file. YOu have attahced .txt file and loading .xlsx file in code...
Pradeepta Sahu
Pradeepta Sahu 2017-10-25
I'm not demanding. I'm asking for help only. However, I've removed the .txt file as i thought it'll be helpful for understanding the code. I was trying to plot a surface from the experimental data of 4 variables(current, angle, torque, fluxlinkage). And the plot is of Time (can be calculated as in code), current and torque.
KSSV
KSSV 2017-10-25
t_res = 0.2;
c_angle = 360/30;
iact = 0.1;
V = 12;
p = 1;
%%fprintf('Slno\t\t Time\t\t Angle(degree)\t\t Current\t\t delta_i\t\t Torque\t\t Fluxlinkage\t\t L_obt\n');
x = zeros(5,1) ;
y = zeros(5,1) ;
z = zeros(5,1) ;
for p=1:5,
Time = p*t_res;
Angle = Time*c_angle/2;
if (p == 1)
delt_i = 0;
else
delt_i = 0.5* t_res* V /L_obt;
end
iact = iact+delt_i;
[~, ~, raw] = xlsread('data1.xlsx','Sheet3','A2:D11');
data = reshape([raw{:}],size(raw));
Current = data(:,1);
Angle1 = data(:,2);
Torque = data(:,3);
Fluxlinkage = data(:,4);
F = scatteredInterpolant(Current,Angle1,Fluxlinkage);
Fluxlinkage = F(iact,Angle);
L_obt = Fluxlinkage/iact;
F = scatteredInterpolant(Current,Angle1,Torque);
Torque = F(iact,Angle);
Table = [p' Time' Angle' iact' delt_i' abs(Torque)' Fluxlinkage' L_obt'];
fprintf('%d\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\n', Table');
x(p) = Time ;
y(p) = iact ;
z(p) = Torque ;
end
plot3(x,y,z);
Pradeepta Sahu
Pradeepta Sahu 2017-10-25
Thanks. But, if i'm trying to plot surface using function surf it's showing an error.
KSSV
KSSV 2017-10-25
For surface....you should refer to my first code......try to involve time in that.
Pradeepta Sahu
Pradeepta Sahu 2017-10-27
编辑：Pradeepta Sahu 2017-10-27
I'm getting an error as "Z must be a matrix, not a scalar or vector".
Pradeepta Sahu
Pradeepta Sahu 2017-11-3
Can you help me to solve this problem?
KSSV
KSSV 2017-11-3
Copy your whole code here....
Pradeepta Sahu
Pradeepta Sahu 2017-11-3
编辑：Pradeepta Sahu 2017-11-3
t_res = 0.2;
c_angle = 360/30;
iact = 0.1;
V = 12;
p = 1;
%%fprintf('Slno\t\t Time\t\t Angle(degree)\t\t Current\t\t delta_i\t\t Torque\t\t Fluxlinkage\t\t L_obt\n');
x = zeros(5,1) ;
y = zeros(5,1) ;
z = zeros(5,1) ;
[~, ~, raw] = xlsread('data1.xlsx','Sheet3','A2:D11');
data = reshape([raw{:}],size(raw));
Current = data(:,1);
Angle1 = data(:,2);
Torque = data(:,3);
Fluxlinkage = data(:,4);
for p=1:5,
Time = p*t_res;
Angle = Time*c_angle/2;
if (p == 1)
delt_i = 0;
else
delt_i = 0.5* t_res* V /L_obt;
end
iact = iact+delt_i;
F = scatteredInterpolant(Current,Angle1,Fluxlinkage);
Fluxlinkage = F(iact,Angle);
L_obt = Fluxlinkage/iact;
F = scatteredInterpolant(Current,Angle1,Torque);
Torque = F(iact,Angle);
Table = [p' Time' Angle' iact' delt_i' abs(Torque)' Fluxlinkage' L_obt'];
fprintf('%d\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\n', Table');
x(p) = Time ;
y(p) = iact ;
z(p) = Torque ;
[C,T,Tor] = meshgrid(iact,Angle, Torque) ;
F = scatteredInterpolant(Current,Angle1,Torque) ;
Tor = F(C,T) ;
end
figure
surf(C,T,Tor) ;

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