how to convert digital data into analog data using matlab code?

how to convert digital data into analog data using matlab code? and vice versa... i.e., converting back analog data into digital data?

[Azzi Abdelmalek]

What is the range of your analog signal, how many bits are you sing?

[Sharada Reddy]

can you tell me how is the DAC in matlab works..? Any codes to convert digital into analog signal

Answer 1

[Azzi Abdelmalek]

U=10; % range signal from 0 to 10
n=3 % number of bits
q=U/(2^n-1)  % quantization interval
t=0:0.1:10; % your time vector
y=abs(10*sin(t)); % your signal
% -------convert to a digital signal yd-----------
a=fix(y/q);
yd=dec2bin(a,n)
% ------you can calculate the signal yq ----------
yq=a*q 
%-------------------------------------------------
plot(t,y,'r')
hold on
plot(t,yq,'g')
hold off

[Richard Lyons]

Mr. Abdelmalek's code sure looks like analog to digital conversion to me. What the original poster wanted was digital to analog conversion!

[Walter Roberson]

The original question also asked "and vice versa"

Answer 2

[po-wei huang]

You can try this sample. Here contain DAC procedure. (But quantizing is skipped.)

https://poweidsplearningpath.blogspot.com/2020/04/ch4-adcdac-how-to-simulate-adcdac.html

Answer 3

[Walter Roberson]

The only built in facility for converting digital to analog are the ones that output to audio devices such as sound() or audiodevicewriter, unless you want to count graphics operators. Or if you want to include the ability to set and clear DTR on a serial port. Everything else needs to talk to a digital to analog converter.