Successfully Did a Gradient Shading by Column - How to do it by row?

[kristen_qlik_noob]

Hello all! 

I have successfully done a gradient shading by column but I do not know how to do it by row. Syntax I am using below:

=Colormix1(

(sum(Q28_2)-$(=min(aggr( sum(Q28_2), Change_Segments))))/

$(=(max(aggr( sum(Q28_2),Change_Segments))-min(aggr( sum(Q28_2),Change_Segments)))),White(),Green()

)

Any help would be appreciated!