matlab 中griddata函数' v4’是什么意思

matlab 中griddata函数' v4’是什么意思

griddata是matlab中的插值函数 ，'v4'是MATLAB自定义的 4 格点样条函数内插选项。

matlab中griddata函数怎么用

不要把help中直接粘上，更好举个例子
知道一系列点的坐标如下（1.486,3.059,0.1）;（2.121,4.041,0.1）;（2.570,3.959,0.1）;（3.439,4.396,0.1）;（4.505,3.012,0.1）;（3.402,1.604,0.1）;（2.570,2.065,0.1）;（2.150,1.970,0.1）;（1.794,3.059,0.2）;（2.121,3.615,0.2）;（2.570,3.473,0.2）;（3.421,4.160,0.2）;（4.271,3.036,0.2）;（3.411,1.876,0.2）;（2.561,2.562,0.2）;（2.179,2.420,0.2）;（2.757,3.024,0.3）;（3.439,3.970,0.3）;（4.084,3.036,0.3）;（3.402,2.077,0.3）;（2.879,3.036,0.4）;（3.421,3.793,0.4）;（3.953,3.036,0.4）;（3.402,2.219,0.4）;（3.000,3.047,0.5）;（3.430,3.639,0.5）;（3.822,3.012,0.5）;（3.411,2.385,0.5）;（3.103,3.012,0.6）;（3.430,3.462,0.6）;（3.710,3.036,0.6）;（3.402,2.562,0.6）;（3.224,3.047,0.7）;（3.411,3.260,0.7）;（3.542,3.024,0.7）;（3.393,2.763,0.7）怎样用MATLAB绘制成三维曲面呢？

使用griddata插值

A=[1.486,3.059,0.1;2.121,4.041,0.1;2.570,3.959,0.1;3.439,4.396,0.1;
4.505,3.012,0.1;3.402,1.604,0.1;2.570,2.065,0.1;2.150,1.970,0.1;
1.794,3.059,0.2;2.121,3.615,0.2;2.570,3.473,0.2;3.421,4.160,0.2;
4.271,3.036,0.2;3.411,1.876,0.2;2.561,2.562,0.2;2.179,2.420,0.2;
2.757,3.024,0.3;3.439,3.970,0.3;4.084,3.036,0.3;3.402,2.077,0.3;
2.879,3.036,0.4;3.421,3.793,0.4;3.953,3.036,0.4;3.402,2.219,0.4;
3.000,3.047,0.5;3.430,3.639,0.5;3.822,3.012,0.5;3.411,2.385,0.5;
3.103,3.012,0.6;3.430,3.462,0.6;3.710,3.036,0.6;3.402,2.562,0.6;
3.224,3.047,0.7;3.411,3.260,0.7;3.542,3.024,0.7;3.393,2.763,0.7];
x=A(:,1);y=A(:,2);z=A(:,3);
scatter(x,y,5,z)%散点图
figure
[X,Y,Z]=griddata(x,y,z,linspace(1.486,4.271)',linspace(1.604,4.276),'v4');%插值
pcolor(X,Y,Z);shading interp%伪彩色图
figure,contourf(X,Y,Z) %等高线图
figure,surf(X,Y,Z)%三维曲面

下面分享相关内容的知识扩展：

matlab做的GUI，别人做的，他说没问题，但到我这就出错

错误是这样;
Error using griddata (line 65)
GRIDDATA no longer requires Qhull-specific options.
Please remove these options when calling GRIDDATA.

Error in interpolation (line 62)
rec_col = griddata(c_,r_,s_,[1:ss(2)*factor],[1:ss(1)*factor]','cubic',{'QJ'}); %
option QJ added to make it work

Error in superresolution>generateImage (line 850)
im_result = interpolation(im_part,delta_est,phi_est,factor);

Error in superresolution>resultButton_Callback (line 1040)
generateImage(handles);

Error in gui_mainfcn (line 96)
feval(varargin{:});

Error in superresolution (line 47)
gui_mainfcn(gui_State, varargin{:});

Error in
guidemfile/@(hObject,eventdata)superresolution('resultButton_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback
他说是版本的问题要用matlab2008a，我装的是2012b，是版本的问题吗？我不懂
没错，是版本问题
GRIDDATA no longer requires Qhull-specific options.
Please remove these options when calling GRIDDATA.
这一句就是griddata函数在你的版本中已经没有了一些参数。但是你写入了，造成错误
rec_col = griddata(c_,r_,s_,[1:ss(2)*factor],[1:ss(1)*factor]'); %
试试看把对应的语句替换成这一句试试

如何用matlab画表层土壤重金属含量的空间分布图

A=[1.486,3.059,0.1;2.121,4.041,0.1;2.570,3.959,0.1;3.439,4.396,0.1;
4.505,3.012,0.1;3.402,1.604,0.1;2.570,2.065,0.1;2.150,1.970,0.1;
1.794,3.059,0.2;2.121,3.615,0.2;2.570,3.473,0.2;3.421,4.160,0.2;
4.271,3.036,0.2;3.411,1.876,0.2;2.561,2.562,0.2;2.179,2.420,0.2;
2.757,3.024,0.3;3.439,3.970,0.3;4.084,3.036,0.3;3.402,2.077,0.3;
2.879,3.036,0.4;3.421,3.793,0.4;3.953,3.036,0.4;3.402,2.219,0.4;
3.000,3.047,0.5;3.430,3.639,0.5;3.822,3.012,0.5;3.411,2.385,0.5;
3.103,3.012,0.6;3.430,3.462,0.6;3.710,3.036,0.6;3.402,2.562,0.6;
3.224,3.047,0.7;3.411,3.260,0.7;3.542,3.024,0.7;3.393,2.763,0.7];
x=A(:,1);y=A(:,2);z=A(:,3);
scatter(x,y,5,z)%散点图
figure
[X,Y,Z]=griddata(x,y,z,linspace(1.486,4.271)',linspace(1.604,4.276),'v4');%插值
pcolor(X,Y,Z);shading interp%伪彩色图
figure,contourf(X,Y,Z) %等高线图
figure,surf(X,Y,Z)%三维曲面

您好!我想请教一个matlab问题

我想请教一个问题：
close all;
clear;
clc;

A=[102.23 1025.80 49.91
97.76 811.30 48.68
94.70 666.38 47.47
91.78 549.29 46.13
88.81 436.39 44.74
86.05 348.60 43.37
83.31 279.69 42.11
80.62 211.55 40.60
78.11 163.31 39.38
76.10 125.74 38.19
74.17 95.64 37.22
72.38 72.10 36.07
70.83 54.58 35.24
69.24 39.63 34.01
67.87 29.26 33.18
66.44 21.70 32.38
64.78 15.66 31.65
63.30 11.46 31.18

];
x=A(:,1);
y=A(:,2);
z=A(:,3);
figure(1);

[X,Y,Z]=griddata(x,y,z,linspace(102.23,63.30)',linspace(1025.80,0),'v4');%插值
surf(X,Y,Z);
%meshz(X,Y,Z) %绘制曲面
axis tight;

这个程序的结果图，我想左上角下移，右下角上移。谢谢指教！
这。。不是画图的问题 你把得到的图旋转一下就成了。。