Question

Can someone tell me why I am receiving this error -- ??? The following error occurred converting from cell to double: Error using ==> double Conversion to double from cell is not possible.

Error in ==> test at 18 CX(end+1,:) = temp(1);

这是代码:

file = fopen( C:Program Files (x86)Notepad++	estFile.txt ); % open text file

tline = fgetl(file); % read line by line and remove new line characters

%declare empty arrays
CX = [];
CY = [];
CZ = [];

while ischar(tline) % true if tline is a character array
    temp = textscan(fid, %*s%f%f%f , Delimiter , ,<> ); % loads the values from all rows with the specified format into the variable data

    CX(end+1,:) = temp(1);
    CY(end+1,:) = temp(2);
    CZ(end+1,:) = temp(3);

    tline = fgetl(file);
end

fclose(file); % close the file

plot3(CX, CY, CZ) % plot the data and label the axises
xlabel( x )
ylabel( y )
zlabel( z ) 
grid on
axis square

Answer 1

使用 < a href=> "http://www.mathworks.com/help/techdoc/ref/cell2mat.html" rel="nofollow" > cell2mat 将单元格阵列(什么是 textscan return)转换成数字阵列,您可以用其他数字阵列来使用数字阵列(在您的情况下,类似于附加到) 。

我也建议使用, 而不是你采用的分类方法:http://www.mathworks.com/help/techdoc/ref/ververtcat.html" rel=“nofollow”>vertcat :

CX = vertcat(CX, cell2mat(temp(1)));

或者,你可以将所有3个值一行一行地读取, 并编成N+3矩阵, 而不是... 很多选项。

Answer 2

快速猜测:使用卷曲牙套有帮助吗?

CX(end+1,:) = temp{1}

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