Convert analog to digital

I am plotting a signal with the following code. I want to convert this signal from analog to digital. Is there any way i can do it, i need to plot a straight line to x axis with each value which i am getting. Thank you in advance.

iSample = 1:iMaxSamples;
Value_AD_Value(iSample) = AD_Value_iAmplitude(iTimeIndex,iChannel,iSample);                             plot(handles.AD_Values,iSample,Value_AD_Value,'LineWidth',2,'Color',ColorSet(ColorArray(iChannel),:));

Answer 1

[Azzi Abdelmalek]

Use stem function instead of plot

[Mrinal]

Thank you.

[Mrinal]

Hello Azzi,

Is there a way to remove the circles terminating each stem ?

[Mrinal]

Got it using

 set(s,'Marker','None');

[Azzi Abdelmalek]

Like this?

y=sin(1:10);stem(y,'.')

[Mrinal]

thnx again for the answer, but i am using

set (s,'Marker','None');