Output argument not assigned?
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Recieve the Error Message When Executing this code, Why is this happening?
Output argument "PID_Performance" (and possibly others) not assigned a value in the execution with "getPerformancePlots" function.
Error in test (line 2)
[PID_Performance,Grill_Status,Component_Performance]=getPerformancePlots(P,I,D,u,grill_state,Temp_F,Auger_RPM,Auger_PWM,Fan_PWM,glowplug_status);
function[PID_Performance,Grill_Status,Component_Performance]=getPerformancePlots(P,I,D,u,grill_state, Temp_F, Auger_RPM, Auger_PWM, Fan_PWM,glowplug_status)
PID_Performance=figure('Name','PID Performance','WindowState','normal','Visible','on');
hold on;
yyaxis left
ylim([-2 2])
xlabel('Time (s)');
ylabel('PID Value');
yticks('auto');
plot(P,'Color', [.13 .13 .13],'LineStyle','-');
plot(I,'Color',[0.9290 0.6940 0.1250],'LineStyle','-');
plot(D,'Color',[0 0.4480 0.7410],'LineStyle','-');
plot(u,'r','LineStyle','-');
yyaxis right;
plot(Temp_F,'Color','#E0932C','LineWidth',1);
if numel(grill_state)>20000
xticks('auto');
elseif numel(grill_state)<5000
xticks(0:500:numel(grill_state));
else
xticks(0:1000:numel(grill_state));
end
ylabel('Temperature (F)');
grid on;
legend('P','I','D','u','Temp F','Location','southoutside','Orientation', 'horizontal');
hold off;
%% Create Grill Status Plot
Grill_Status=figure('Name','Grill Status','WindowState','normal','Visible','on');
grid on;
plot(glowplug_status,'Color','#D95319');
hold on;
plot(grill_state,'LineStyle','--','Color','#77AC30');
xlabel('Time (s)');
yticks(0:1:5)
if numel(grill_state)>20000
xticks(0:2000:numel(grill_state));
elseif numel(grill_state)>10000
xticks(0:1000:numel(grill_state));
else
xticks(0:500:numel(grill_state))
end
legend('Glowplug Status',"Grill State",'Location','southoutside','Orientation','horizontal')
%% Create Component Performance Plot
Component_Performance=figure('Name','Component Performance','WindowState','normal','Visible','on');
grid on;
xlabel('Time (s)');
if numel(grill_state)>20000
xticks("auto");
else
xticks(0:1000:numel(grill_state));
end
yyaxis right;
plot(Temp_F,'Color','#E0932C','LineWidth',1,"DisplayName","Probe Temp F");
hold on;
ylabel('Temperature (F)')
yyaxis left;
yticks(0:50:max(Auger_RPM.*100));
ylabel('PWM/RPM');
plot(Auger_PWM,'LineStyle','-','Color','#FAA533',"DisplayName","Auger PWM");
plot(Auger_RPM.*100,'LineStyle','-','Color','#21ABDE',"DisplayName","Auger RPM");
plot(Fan_PWM,'LineStyle','-','Color','#94918D',"DisplayName","Fan PWM");
legend('Location','southoutside','Orientation','horizontal')
end
>>
댓글 수: 7
Jan
2022년 10월 27일
You see, that there are 2 functions with the same name. Are you sure, that the posted function is the one, which produces the error message?
답변 (2개)
Image Analyst
2022년 10월 26일
If you return output variables you need to set them. You did not for the Grill_Status and Component_Performance return variables. Try this:
function[PID_Performance, Grill_Status, Component_Performance]=getPerformancePlots(P,I,D,u,grill_state, Temp_F, Auger_RPM, Auger_PWM, Fan_PWM,glowplug_status)
% Initialize all return variables to null.
PID_Performance = [];
Grill_Status = [];
Component_Performance = [];
% Now start the function statements.
PID_Performance=figure('Name','PID Performance','WindowState','normal','Visible','on');
% and so on.
댓글 수: 2
Image Analyst
2022년 10월 27일
I don't see how it can say they're not assigned when you did it immediately upon entering. OK how about if the function definition is only these 4 lines:
function[PID_Performance, Grill_Status, Component_Performance]=getPerformancePlots(P,I,D,u,grill_state, Temp_F, Auger_RPM, Auger_PWM, Fan_PWM,glowplug_status)
% Initialize all return variables to null.
PID_Performance = [];
Grill_Status = [];
Component_Performance = [];
Try that. You'd better not get that "output arg not assigned" error or else you're not running the actual piece of code you think you are.
sui en
2023년 4월 4일
This problem is easy to solve, and when assigning a value to a variable in a function, it needs to be declared first.
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