How can I do zero padding before IFFT? (matlab)

I have an issue of applying IFFT in matlab.

I have signal in frequency domain (X(k)) with bandwidth (2−3)MHz. with with seperation freqency is 10khz and 101 point. So, in order to apply IFFT, i just wrote:

   Xf= IFFT(X); 
   plot(0:(1/1e6):Nf*(1/1e6),Xf)

Then, i got symmetric figure.

I want to pad zeros before IFFT. can you help me?

Answer 1

[Abhishek Ballaney]

https://in.mathworks.com/help/images/ref/padarray.html

[ali]

in basic level how many zeros i have to add and how long? and how ?