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if your csv is like this (label is 1st column):

2,  1.4, 5.7, 6.6, 0.2
^            ^
label      data

then responseStartIdx is 0 and responseEndIdx is 1 .

if your data is all numeric, you do not need to pass anything for varTypeSpec, this is only nessecary if you have "mixed" data like:

  1.2, apple, 17

if your csv is like this (label is 1st column):

2,  1.4, 5.7, 6.6, 0.2
^            ^
label      data

then responseStartIdx is 0 and responseEndIdx is 1 .

(if your labels are in the last column, leave both at -1 (the default))

if your data is all numeric, you do not need to pass anything for varTypeSpec, this is only nessecary if you have "mixed" data like:

  1.2, apple, 17