dendrogram plot using parent-children data (without using linkage function)

How can I plot a dendogram plot, if I know the parent and children for each node. I do not want to use linkage function. for instance:

parent==0 children==[1,2]

parent==1 children==[3,4]

parent==2 children==[]

Answer 1

[Matt Learner]

I found the answer of my question. Please take a look at this File Exchange and also this great tutorial .