Anconda activation and deactivation functions for ZSH

anaconda.sh

# Functions to activate/deactivate Continuum Analytics Anaconda Python distribution
# by manipulating the $PATH.
export ANACONDA_PATH="$HOME/anaconda/bin"

function have_anaconda(){
    [[ -n $path[(r)$ANACONDA_PATH] ]]
}

function anaconda_on(){
    if have_anaconda ; then
        print "Anaconda already activated"
    else
        export PATH=$ANACONDA_PATH:$PATH
    fi
}

function anaconda_off(){
    if ! have_anaconda ; then
        print "Anaconda not found on PATH"
    else
        path[$path[(i)$ANACONDA_PATH]]=()
    fi
}

Thanks for the great script!
if someone is having trouble in ubuntu, anaconda 2.7 is installed in $HOME/anaconda2/.
So in ubuntu you need export ANACONDA_PATH="$HOME/anaconda2/bin"