mxArray problem

12 次查看（过去 30 天）
dimitris
dimitris 2011-11-1
In a simulink model I use a matlab function block in which i open a file(fopen), read some numbers(fscanf) and put them in an array.Then i close the file. The problem is that when i try to access the elements of the array, for example write ARRAY(1), i get the following error : "Subscripting into an mxArray is not supported."
How i will be able to have access to this array?

请先登录，再回答此问题。

采纳的回答

Kaustubha Govind
Kaustubha Govind 2011-11-1

更多回答（2 个）

Rajaram B S R
Rajaram B S R 2011-11-1
I think the problem is,
1) Data read from the file is of type mxArray and, 2) In the mex function (C coding mode) you are trying to access the contents directly.
For subscripting to be possible, you need to copy it into a local dynamically allocated array and then extract the data using mxGetChars or mxGetPr depending on the data in the file.
  1 个评论
dimitris
dimitris 2011-11-1
I did not make it clear but i am writing matlab code and not C but thank you for your response.

请先登录，再进行评论。

Kristian Vepsäläinen
编辑：Kristian Vepsäläinen 2013-7-31
I have simulink file model where I use matlab function block and there is code:
function sovitus=f(x1,x2,x3,x4,x5)
coder.extrinsic('smooth');
x=[x1 x2 x3 x4 x5];
apu=smooth(x,'sgolay');
sovitus=apu(1);
I have tried use foo(apu(1)) but it don't work. Error is Subscripting into an mxArray is not supported. What I should to do?
  1 个评论
Kaustubha Govind
Kaustubha Govind 2013-7-31
Did you follow the solution linked in my answer? You need to pre-allocate the variable apu.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Simulink Functions 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by