The dummy dataframe is from some Linguistics data.
Looking to make four new columns based on Column type for ‘C1′, V1’, ‘C2’, ‘V2’, ‘B’, and ‘E’ from the numeric values in column duration.

     file sentence iSentence wordType FCPhrase V1Vowel sampleQuality phoneme type   duration
1 PS_G.TextGrid    kalla         2        G        F       S             B       B    B 0.18929576
2 PS_G.TextGrid    kalla         2        G        F       S             B       k   C1 0.09941696
3 PS_G.TextGrid    kalla         2        G        F       S             B       ə   V1 0.05025876
4 PS_G.TextGrid    kalla         2        G        F       S             B      ll   C2 0.12619718
5 PS_G.TextGrid    kalla         2        G        F       S             B      a:   V2 0.13646904
6 PS_G.TextGrid    kalla         2        G        F       S             B       E    E 0.53416178

Any help shall be appreciated. If it is a duplicate question, kindly provide the link. Thanks.