How do I display 2 lines on a line graph? The fields used are "MatlTemp" and "Hour" and it is sorted by "Batch"

[donny__0]

I am using 2 csv files and the "inputlookup" method.  Right now I am appending one of the csv to another csv, but the line chart that is displayed out only have one line. Both of the csv files has the same fields but i want the the graph to have 2 lines, one line for the first "batch" and the second line for the second "Batch" . How do I write the codes to let the graph get sorted by the "Batch" number so there will be 2 lines?

Current codes : 

 | from inputlookup:"5019609_V-094_9007270566.csv"| append [| from inputlookup "5019609_V-094_9007280926.csv"] |  fields  Hr  MatlTemp

Current Picture of line graph :

[isoutamo]

You could rename one of those MatlTemp eg. MatlTemp2 inside append and add also that field to the end of fields.

[donny__0]

Okay a second line appeared but is it there a solution to sort the line chart by fields instead? I have a big data so its not efficient to rename the fields every time I want to compare a new set of data. If there is a sorting solution then the data would automatically be sorted by the "Batch" number. Thank You!