Draw Process Tree of Commands
You don't give too many details what you have and what you exactly want. So I assume something. Certainly, room for improvements. To learn more about plotting styles, in gnuplot console check help points
, help vectors
, help labels
.
Code:
### drawing a simple tree reset session $Children <<EOD 23 34 45 56 67 78 EOD $Parent <<EOD 123 EOD unset border unset tics Size = 8 set offsets 0.2,0.2,0.2,0.2 plot $Children u (Last=$0):(1):1 w labels not, \ '' u 0:(1):(Last/2-$0):(1) w vectors nohead lc rgb "black" notitle, \ '' u 0:(1):(Size) w p pt 7 ps var lc rgb "yellow" not, \ '' u 0:(1):1 w labels not, \ $Parent u (Last/2):(2):(Size) w p pt 7 ps var lc rgb "light-grey" not, \ '' u (Last/2):(2):1 w labels center not ### end of code
Result:
Addition:
Actually, you can do a bit more complex tree diagrams with gnuplot. Fortunately, gnuplot allows for recursive functions.
The input consists out of 3 columns without header. Each ID has only one parent, except one which is the top node. An ID can have several children.
Prerequisites:
- Column 1 contains unique integer ID numbers
- Column 2 contains the parent ID of the child ID in column 1, or
NaN
for the top node. - Column 3 names of labels of the nodes
Improvements are welcome.
Code: (actually some "nonsense" tree)
### tree diagram with gnuplot reset session #ID Parent Name $Data <<EOD 1 NaN Ant 2 1 Ape 3 1 Ass 4 2 Bat 5 2 Bee 6 2 Cat 7 3 Cod 8 3 Cow 9 3 Dog 10 7 Eel 11 7 Elk 12 7 Emu 13 9 Fly 14 9 Fox 15 4 Gnu 16 1 Hen 17 16 Hog 18 12 Jay 19 12 Owl 20 15 Pig 21 15 Pug 22 12 Ram 23 14 Rat 24 12 Sow 25 7 Yak EOD # put datablock into strings IDs = Parents = Names = '' set table $Dummy plot $Data u (IDs = IDs.strcol(1).' '): \ (Parents = Parents.strcol(2).' '): \ (Names = Names.strcol(3).' ') w table unset table # Top node has no parent ID 'NaN' Start(n) = int(sum [i=1:words(Parents)] (word(Parents,i) eq 'NaN' ? int(word(IDs,i)) : 0)) # get list index by ID ItemIdx(s,n) = n == n ? (tmp=NaN, sum [i=1:words(s)] ((word(s,i)) == n ? (tmp=i,0) : 0), tmp) : NaN # get parent of ID n Parent(n) = word(Parents,ItemIdx(IDs,n)) # get level of ID n, recursive function Level(n) = n == n ? Parent(n)>0 ? Level(Parent(n))-1 : 0 : NaN # get number of children of ID n ChildCount(n) = int(sum [i=1:words(Parents)] (word(Parents,i)==n)) # Create child list of ID n ChildList(n) = (Ch = ' ', sum [i=1:words(IDs)] (word(Parents,i)==n ? (Ch = Ch.word(IDs,i).' ',1) : (Ch,0) ), Ch ) # m-th child of ID n Child(n,m) = word(ChildList(n),m) # List of leaves, recursive function LeafList(n) = (LL='', ChildCount(n)==0 ? LL=LL.n.' ' : sum [i=1:ChildCount(n)] (LL=LL.LeafList(Child(n,i)), 0),LL) # create list of all leaves LeafAll = LeafList(Start(0)) # get x-position of ID n, recursive function XPos(n) = ChildCount(n) == 0 ? ItemIdx(LeafAll,n) : (sum [i=1:ChildCount(n)] (XPos(Child(n,i))))/(ChildCount(n)) # create the tree datablock for plotting set print $Tree do for [j=1:words(IDs)] { n = int(word(IDs,j)) print sprintf("% 3d % 7.2f % 4d % 5s", n, XPos(n), Level(n), word(Names,j)) } set print print $Tree # get x and y distance from ID n to its parent dx(n) = XPos(Parent(int(n))) - XPos(int(n)) dy(n) = Level(Parent(int(n))) - Level(int(n)) unset border unset tics set offsets 0.25, 0.25, 0.25, 0.25 plot $Tree u 2:3:(dx($1)):(dy($1)) w vec nohead ls -1 not,\ '' u 2:3 w p pt 7 ps 6 lc rgb 0xccffcc not, \ '' u 2:3 w p pt 6 ps 6 lw 1.5 lc rgb "black" not, \ '' u 2:3:4 w labels offset 0,0.1 center not ### end of code
Result:
Source: https://stackoverflow.com/questions/60681247/draw-process-tree-with-gnuplot
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