Understanding how to use the function griddata

10 次查看（过去 30 天）
Priscilla Ramirez
评论： Rena Berman 2020-5-14
graph = xlsread('Path3.xlsx');
x=graph(:,1);
y=graph(:,2);
z=graph(:,3);
[X,Y]= meshgrid(x,y);
Z = griddata(x,y,z,X,Y);
A = mesh(X,Y,Z);
hold on
surf(A);
hold off
xlabel('x'),ylabel('y'),zlabel('z'),title('title')
I have an excel file which I have imported with latitude, longitude and elevation in 3 columns. I'm trying to use the function meshgrid with the latitude and longitude values, and then the function griddata to fit the elevation data points to the meshgrid to develop a surface plot for latitude, longitude, and elevation. I keep getting the following two errors:
Error using surf (line 71)
Z must be a matrix, not a scalar or vector.
Error in (line 49)
surf(A);
>>
  3 个评论
显示 1更早的评论
Stephen23
Stephen23 2020-4-5
Original function by Paul Ramirez, from Google Cache:
"Understanding how to use the function griddata"
graph = xlsread('Path3.xlsx');
x=graph(:,1);
y=graph(:,2);
z=graph(:,3);
[X,Y]= meshgrid(x,y);
Z = griddata(x,y,z,X,Y);
A = mesh(X,Y,Z);
hold on
surf(A);
hold off
xlabel('x'),ylabel('y'),zlabel('z'),title('title')
I have an excel file which I have imported with latitude, longitude and elevation in 3 columns. I'm trying to use the function meshgrid with the latitude and longitude values, and then the function griddata to fit the elevation data points to the meshgrid to develop a surface plot for latitude, longitude, and elevation. I keep getting the following two errors:
Error using surf (line 71)
Z must be a matrix, not a scalar or vector.
Error in (line 49)
surf(A);
>>

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 2020-4-5
graph = xlsread('Path3.xlsx');
x=graph(:,1);
y=graph(:,2);
z=graph(:,3);
[X,Y]= meshgrid(x,y);
Z = griddata(x,y,z,X,Y);
surf(X, Y, Z); %includes edges such as would be drawn by mesh()
xlabel('x'),ylabel('y'),zlabel('z'),title('title')

更多回答（0 个）

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