What is my syntax lacking to achieve an accumulative-progressing animation of the plot?

hold on 

for idx = 1:10 
    plot(idx, density(idx),"*") 
    drawnow 
xlim([0.0 10.0])
ylim([0.0 6.1])
    hold on 
    plot(1:idx, density(1:idx),"*") 
    drawnow 
end 

Unrecognized function or variable 'density'.

Answer 1

[Dyuman Joshi]

I assume you want to add a point to the graph iteration wise.

In that case, try this -

%Sample values
density = rand(1,10);

%Initialize an animated line with specifications as needed
h = animatedline('Marker', '*');

for idx = 1:10
    %Add points to the line
    addpoints(h, idx, density(idx))
    %Update the figure
    drawnow
end 

[Dyuman Joshi]

Any updates? @CHUN HIN KYLE

[CHUN HIN KYLE]

Cool, your syntax totally worked.

Thank you for that.

On the other hand, I added " pause(0.5) " in my final code and it also worked.

[Dyuman Joshi]

You're welcome!

Yes, using pause() is equivalent to calling drawnow, see here - https://in.mathworks.com/help/matlab/ref/drawnow.html?s_tid=doc_ta#burd3gs-3

[CHUN HIN KYLE]

Then why did it only work when the equivalent of "drawnow" is repeated?