Changing Variable from logical to double

89 次查看（过去 30 天）
Sivakumar Rajagopal
编辑： Adam Danz 2020-4-6
Fx=edge(I1,'Sobel','vertical',0.001);
While executing above line the follwoing error message is received
"Variable Fx must be of data type double. It is currently of type logical. Check where the variable is assigned a value."
How change Fx type feom logical to double
  8 个评论
显示 6更早的评论
Adam Danz
Adam Danz 2020-4-3
编辑：Adam Danz 2020-4-3
Again, it makes no sense to me why this line
Fx=conv2(I,Gx);
would generate this specific error
Variable Fx must be of size [500 500]. It is currently of size [502 502] . . . . .
That line is merely assigning the output to variable Fx. I think the error is being generated somewhere else in a line where you're using the variable Fx. Could you provide a screenshot of the error and the code that causes the error? I'm unfamiliar with Coursera Matlab - does that mean you are running matlab online through a coursera portal or are you running Matlab on your computer using a license provided by Coursera?
If the output has an unexpected size, read about the conv2 output size here.
To show that the code should not cause an error (given a proper image file), this runs fine:
RGB = imread('peppers.png'); % Built-in matlab file
I = rgb2gray(RGB);
Gx=[-1,0,1;-2,0,2;-1,0,1];
Fx=conv2(double(I),Gx);

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Adam Danz
Adam Danz 2020-4-2
编辑：Adam Danz 2020-4-6
"How change Fx type from logical to double"
FxDlb = double(Fx);
alternatively,
FxDlb = Fx * 1;
% or
FxDlb = Fx + 0;

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Introduction to Installation and Licensing 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