Plot a surface with X Y Z data

300 次查看（过去 30 天）
Ujjwal
Ujjwal 2014-7-15
评论： Alak A A Abduljabar 2023-6-13
I am importing three different data sets from excel sheet and I want to plot the latitude, longitude on x and y axis and energy on z axis.
Whenever I import the three data-sets and use the surface function, matlab displays an error that Z must be a matrix not a scalar or vector. I am unable to rectify this as I feel the imported data is already in the form of a matrix.
Please suggest the edit to rectify the error.
PROGRAM:
close all
clear all
clc
[~,long_energy] = xlsread('Energy','B:B');
[~,lat_energy] = xlsread('Energy','A:A');
EE = xlsread('Energy', 'J:J');
lat = str2double(lat_energy);
long = str2double(long_energy);
surf(lat,long, EE);
  3 个评论
显示 1更早的评论
Ujjwal
Ujjwal 2014-7-15
Yes. First column is Latitude, second is Longitude and the last is Energy.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2017-10-11
num = xlsread('Energy.xlsx');
long_energy = num(:,2);
lat_energy = num(:,1);
EE = num(:,end);
F = scatteredInterpolant(long_energy, lat_energy, EE);
min_long = min(long_energy);
min_lat = min(lat_energy);
max_long = max(long_energy);
max_lat = max(lat_energy);
proj_long = linspace(min_long, max_long, 100);
proj_lat = linspace(min_lat, max_lat, 100);
[PROJ_LONG, PROJ_LAT] = ndgrid(proj_long, proj_lat);
PROJ_EE = F(PROJ_LONG, PROJ_LAT);
surf(PROJ_LONG, PROJ_LAT, PROJ_EE, 'edgecolor', 'none');
  1 个评论
Jason Burke
Jason Burke 2021-5-4
I tried this approah with my own data, but when using surf, I still get the error "Z must be a matrix, not a scaler or vector".

请先登录，再进行评论。

更多回答（7 个）

Shivam Anand
Shivam Anand 2022-5-11
x=[32 20 67 1 98 34 57 65 24 82 47 55 8 51 13 14 18 30 37 39 10 33 21 26 38 81 83 60 95 22 17 5 72 46 99 52 12 25 96 29 70 85 43 69 19 78 97 31 89 53 2 91 48 71 61 15 36 84 94 50 11 80 6 7 49 74 9 88 40 79 27 68 73 64 63 59 86 23 35 58 45 28 100 42 93 87 16 90 41 66 54 92 77 4 62 76 75 56 3 44];
y=[96 75 24 9 83 49 27 77 3 23 17 31 40 13 7 52 51 21 98 47 64 79 78 91 44 16 15 100 84 99 63 68 70 30 54 76 97 73 33 5 88 8 71 66 62 25 60 42 72 45 18 11 28 59 89 65 10 55 69 81 12 26 20 95 87 41 74 50 93 22 43 90 14 34 82 35 56 38 80 32 1 57 6 36 37 61 29 58 2 48 4 46 67 53 92 86 94 19 39 85];
z=[55 31 11 45 83 36 86 49 15 57 42 46 8 94 88 47 54 81 98 41 32 35 56 85 9 89 37 60 23 62 67 100 78 76 73 80 10 20 68 34 77 93 1 63 53 12 22 99 91 40 84 24 33 3 43 19 92 97 6 82 64 25 26 79 95 4 44 58 5 21 70 29 65 87 96 90 51 14 18 2 72 28 71 39 52 7 27 59 50 61 48 30 66 69 17 13 74 16 75 38];
xlin = linspace(min(x), max(x), 100);
ylin = linspace(min(y), max(y), 100);
[X,Y] = meshgrid(xlin, ylin);
% Z = griddata(x,y,z,X,Y,'natural');
% Z = griddata(x,y,z,X,Y,'cubic');
Z = griddata(x,y,z,X,Y,'v4');
mesh(X,Y,Z)
axis tight; hold on
plot3(x,y,z,'.','MarkerSize',15)
Toby
Toby 2017-10-10
It sounds like you're looking for
scatter3(x,y,z)
https://www.mathworks.com/help/matlab/ref/scatter3.html
  2 个评论
Gennadij Nikitin
Gennadij Nikitin 2019-9-18
Yes! scatter3(x,y,z) is indeed what i was looking for, thank you!
Yohana
Yohana 2023-1-2
Attempt with Mat lab to produce the results shown on slides 30, 32, 37, 38, 43, 44, 48, 52, 56, 57, 59, 60, 70, 71, 72.

请先登录，再进行评论。

Azzi Abdelmalek
Azzi Abdelmalek 2014-7-15
When x, y and z are vector, you can't use surf(x,y,z). x,y and z should be matrices of the same size look at surf function. What you can do with your vectors is
plot3(lat,long, EE)
  2 个评论
Ujjwal
Ujjwal 2014-7-15
Using the plot function, I get lines which is not really a kind of result I am looking for. I want to portray the result using a surface.
Ozan Akyildiz
Ozan Akyildiz 2021-10-15
All you need to do for that is specifying '.' as your marker:
plot3(lat,long, EE,'.')
The rest is also just customizing your plot.

请先登录，再进行评论。

Joseph Cheng
Joseph Cheng 2014-7-15
编辑：Joseph Cheng 2014-7-15
you can try to use the interp2() function. I haven't checked your excel file but it may accomplish what you're looking for. by using your data and attempting to put it in a meshgrid format.
Kenzai
Kenzai 2017-10-4
Is this question ever been answered ? Because I'm stuck on a likewise problem. Thanks ahead!
  1 个评论
Yohana
Yohana 2023-1-2
Attempt with Mat lab to produce the results shown on slides 30, 32, 37, 38, 43, 44, 48, 52, 56, 57, 59, 60, 70, 71, 72.
Help me please

请先登录，再进行评论。

Shubham Agrawal
Shubham Agrawal 2017-10-8
bump, same question - what's the best way to plot a set of X, Y and Z data?
Sheriza
Sheriza 2022-9-1
x = [0 5 10 15 20 26 27 28 30 30 30 30 30 25 20 15 10 5 0 0 0 0 5 10 15 20 25 25 25 20 15 12 10 5 5 10 14 15 20];
y=[0 0 0 0 0 0 0 0 0 5 10 15 20 20 20 20 20 20 20 15 10 5 5 5 5 5 5 10 15 15 15 15 15 15 10 10 10 10 10];
Z=[13.08 13.74 11.43 22.34 25.74 20.00 12.89 26.41 19.36 19.75 17.08 22.52 21.70 18.29 25.68 24.90 22.78 12.47 17.80 13.13 20.23 14.53 10.78 17.95 22.40 15.15 10.18 14.75 19.15 14.34 12.77 23.95 24.35 4.92 18.11 14.08 24.95 22.48 18.63];
xlin = linspace(min(x), max(x), 100);
ylin = linspace(min(y), max(y), 100);
[X,Y] = meshgrid(xlin, ylin);
% Z = griddata(x,y,z,X,Y,'natural');
% Z = griddata(x,y,z,X,Y,'cubic');
Z = griddata(x,y,z,X,Y,'v4');
mesh(X,Y,Z)
axis tight; hold on
plot3(x,y,z,'.','MarkerSize',15)

类别

在 Help Center 和 File Exchange 中查找有关 Surface and Mesh Plots 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by