can you help me solve this error?

hey, Im new in this community and this error keep on popping up

Im in need of your help!!

Dot indexing is not supported for variables of this type.

Error in MAGNETORQUER>get_Callback (line 274)

if (length(ud.Data) == 10)

this is the part of the code :

if (length(ud.Data) == 10)

%Acceleration in m/s2

Ax=ud.Data(1)/AccelScaleFactor*9.81 ;

Ay=ud.Data(2)/AccelScaleFactor*9.81;

Az=ud.Data(3)/AccelScaleFactor*9.81;

%Angular speed in deg/s

Gx=ud.Data(5)/GyroScaleFactor;

Gy=ud.Data(6)/GyroScaleFactor;

Gz=ud.Data(7)/GyroScaleFactor;

%Magnetometer data in uT

mx=ud.Data(8)/MagnetScaleFactor;

my=ud.Data(9)/MagnetScaleFactor;

mz=ud.Data(10)/MagnetScaleFactor;

set(handles.axeX,'string',num2str(mx,3));

set(handles.axeY,'string',num2str(my,3));

set(handles.axeZ,'string',num2str(mz,3));

set(handles.dipoleX,'string',num2str(Gxx,3));

set(handles.dipoleY,'string',num2str(Gyy,3));

set(handles.dipoleZ,'string',num2str(Gzz,3));

set(handles.bex,'string',num2str(Ax,3));

set(handles.bey,'string',num2str(Ay,3));

set(handles.bez,'string',num2str(Az,3));

Answer 1

[Andreas Goser]

Dot indexing is a way of accessing data fields in MATLAB structs. The question now is: Is your variable ud a struct? Can you let us know what ud is?

[9L_peek]

Yes its a structure of 10 bits

[Walter Roberson]

At the point of the error, it is not a struct. It is probably empty. Is this part of a loop?

[9L_peek]

Yes its a part of a while loop Its a data retrieving loop from 2 sensors mpu6050 and a magnetometer

[Walter Roberson]

At some point, either at the beginning or after operating for a while, ud is not a struct.

Use

dbstop if error

and run your code and examine ud at the time of the problem.