How can I avoid problems when using LOAD in the timer function in MATLAB (R14SP3)?

I am unable to load variables within my timer function (in my GUI) from a MAT file. These variables are generated by RSIM.

Answer 1

[MathWorks Support Team]

You can solve the issue by defining these variables es empty. The following code is an extract of his GUI source code - the timer script:

function timer_function(varargin1, DIR_MEASGUI)

global t;

DIR_MEASGUI = 'd:\Hydraulik\';

DIR_PROG = 'd:\Hydraulik\prog\';

DIR_RAWDATA = 'd:\Hydraulik\data\raw\';

if(strcmp(varargin1, 'timer_start'))

% make timer that is adequate for checking the directory;D:\brake\data

t=timer('StartDelay', 2, 'Period', 3, 'ExecutionMode', 'fixedSpacing', 'BusyMode', 'drop');

%t=timer('StartDelay', 2, 'Period', 3, 'ExecutionMode', 'fixedSpacing','BusyMode','queue');

% set TimerFcn to 'timer_function_measurement()';

% cd(DIR_MEASGUI);

%load('D:\Hydraulik\prog\workspace.mat')

t.TimerFcn = {@my_timer_callback};

% start timer

start(t);

else

% stop timer and delete

stop(t);

disp('stop the measurement');

delete(t);

end

function my_timer_callback(obj, event)

% default data folder

disp('checking the directory....');

% scan directory for mat files and save into struct

TempDir = dir([ DIR_RAWDATA '\*.mat']);

if length(TempDir)>0

% if there is a file, execute 'measurement_description';

actual_dir = pwd;

%----------------------------------------------------------------

% without this part it doesn't work!

VX=[];

BLS=[];

ResetSpeedOnOff=[];

ResetSpeed=[];

Timevec=[];

TStart=[];

TFinal=[];

result=[];

Name=[];

VehicleSpeed_m_s=[];

tout=[];

%warning off

load('D:\Hydraulik\prog\workspace.mat')

TStart=Timevec(1);

TFinal=Timevec(end);

sim('only_stoppingdistance.mdl',[TStart TFinal]);

result=struct('MFDD',MFDD(end),'MeanDeceleration',MeanDeceleration_vref(end),'ResetSpeed',ResetSpeed,'ResetSpeedOnOff',ResetSpeedOnOff,'Stoppingdistance',Stoppingdistance(end),'Vo_measured',Vo_measured(end))

Name = ['StoppingDistance_Hydraulic_',datestr(now,'dd-mm-yyyy_HH-MM-SS')]

save (Name ,'Timevec','BrakeDemand','BrakeDemandActive','MFDD','MeanDeceleration_vref','MeasureActive_vref','ResetSpeed','ResetSpeedOnOff','Stoppingdistance','VX_Correvit','VehicleSpeed_km_h','Vo_measured','result');

%------------------------------------------------------

cd(actual_dir)

end

end

end