Most of the tree disappears when it's too big

Question

I'm trying to draw suffix trees in latex for a report. Since I'm programming trees I just print them in qtree format from my code so that I don't have to bother making them manually.

For small trees this works great. (The usual "banana" example incoming)

\documentclass{article}
\usepackage{graphics}
\usepackage{qtree}

\begin{document}
    \begin{center}
        \Tree[.  [.\$ ]
        [.banana\$ ]
        [.a [.n [.a [.na\$ ]
        [.\$ ]
        ]  ] [.\$ ]
        ] [.n [.a [.na\$ ]
        [.\$ ]
        ]  ]  ]
    \end{center}
\end{document}

But if I want to draw a bigger tree, like "idontknowsomethingbig" I use the same process:

\documentclass{article}
\usepackage{graphics}
\usepackage{qtree}

\begin{document}
    \begin{center}
        \Tree[.  [.\$idontknowsomethingbig\$ ]
        [.i [.dontknowsomethingbig\$ ]
        [.ngbig\$ ]
        [.g\$ ]
        ] [.dontknowsomethingbig\$ ]
        [.o [.ntknowsomethingbig\$ ]
        [.wsomethingbig\$ ]
        [.methingbig\$ ]
        ] [.n [.tknowsomethingbig\$ ]
        [.owsomethingbig\$ ]
        [.gbig\$ ]
        ] [.t [.knowsomethingbig\$ ]
        [.hingbig\$ ]
        ] [.knowsomethingbig\$ ]
        [.wsomethingbig\$ ]
        [.somethingbig\$ ]
        [.methingbig\$ ]
        [.ethingbig\$ ]
        [.hingbig\$ ]
        [.g [.big\$ ]
        [.\$ ]
        ] [.big\$ ]
        ]
    \end{center}
\end{document}

All I get is this

Depending on the input I may get the last branch or just a word like in this case.

My guess is the code is syntactically correct and that the problem lies in it being to big and latex getting confused by it. But afaik it could be anything.

Answer 1

The problem as the comments explained is that qtree can't handle more than 14 branches. The solution was to simply use forest instead. With it I can now draw bigger trees such as this one:

Which comes from:

\documentclass[border=1mm]{standalone}
\usepackage{graphics}
\usepackage{forest}


\begin{document}

        \begin{forest}
            for tree={
                calign=center,
                grow'=east,
                parent anchor=east, child anchor=west,
                text height=1.4ex, text depth=0.2ex 
            }
            [.  [.\$GATTACATAGCTGATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.G [.A [.T [.TACATAGCTGATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.G [.C [.TAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ]  ] [.AGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.CTGS\$ ]
            ]  ] [.C [.T [.GATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.A [.G [.C [.T [.A [.TATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GTCGTAGCTATGATCTGS\$ ]
            ]  ]  ] [.TCGTAGCTATGATCTGS\$ ]
            ] [.T [.ATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GATCTGS\$ ]
            ]  ] [.CGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ] [.G [.CTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.ATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ]  ] [.T [.C [.G [.ATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.TAGCTATGATCTGS\$ ]
            ]  ] [.AGCTATGATCTGS\$ ]
            ] [.S\$ ]
            ] [.A [.T [.TACATAGCTGATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.A [.G [.C [.T [.GATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.AGCTAGTCGTAGCTATGATCTGS\$ ]
            ]  ]  ] [.TCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ] [.G [.C [.TAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ] [.ATCTGS\$ ]
            ] [.C [.GTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.TGS\$ ]
            ]  ] [.CATAGCTGATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.G [.C [.T [.GATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.A [.T [.ATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GATCTGS\$ ]
            ] [.G [.CTAGTCGTAGCTATGATCTGS\$ ]
            [.TCGTAGCTATGATCTGS\$ ]
            ]  ]  ]  ] [.TCGTAGCTATGATCTGS\$ ]
            ]  ] [.T [.TACATAGCTGATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.A [.CATAGCTGATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.G [.C [.T [.GATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.A [.T [.ATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GATCTGS\$ ]
            ] [.G [.CTAGTCGTAGCTATGATCTGS\$ ]
            [.TCGTAGCTATGATCTGS\$ ]
            ]  ]  ]  ] [.TCGTAGCTATGATCTGS\$ ]
            ] [.T [.ATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.CGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GATCTGS\$ ]
            ]  ] [.G [.A [.T [.GCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.CTGS\$ ]
            ]  ] [.C [.TAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ] [.S\$ ]
            ] [.C [.G [.T [.CGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.AGCTATGATCTGS\$ ]
            ] [.ATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.CGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ] [.TGS\$ ]
            ]  ] [.C [.ATAGCTGATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.T [.G [.ATGCTAGCTATATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.S\$ ]
            ] [.A [.G [.C [.T [.A [.TATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GTCGTAGCTATGATCTGS\$ ]
            ]  ]  ] [.TCGTAGCTATGATCTGS\$ ]
            ] [.T [.ATCGTCGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GATCTGS\$ ]
            ]  ] [.CGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ] [.G [.T [.CGATGCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.AGCTATGATCTGS\$ ]
            ] [.A [.T [.GCGCTCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.AGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ]  ] [.C [.TCGCGATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            [.GATAGCTAGCTAGTCGTAGCTATGATCTGS\$ ]
            ]  ]  ] [.S\$ ]
            ] 
        \end{forest}  


\end{document}

The syntax in forest differs from qtree so every node has an extra '.' character in this example. Keep this in mind if you are using this answer as an example on how to build trees using forest :)