Re: [R] Loops and vector operations

Thanks a lot, it was very helpful, I did something like that: EV - ifelse(sprd mediaSDP sprd_d = mediaSDP_d, -1, 0) SV - ifelse(sprd media sprd_d = media_d, -17, 0) EC - ifelse(sprd mediaSDN sprd_d = mediaSDN_d,1,0) SC - ifelse(sprd media sprd_d = media_d,17,0) in order to have 4

[R] Loops and vector operations

Dear all, this is my first post and I´m very new at R, I don´t know if somebody can help with an issue. I´m doing some exercices and I don´t know if for example I can convert this for in an operation with vectors: for (i in 2:n){ if (ES[i-1]==0 sprd[i-1]mediaSDP[i-1]

Re: [R] Loops and vector operations

Look at ?ifelse. You'll need to nest them however. If you are feeling a little more ambitious this can be done with ?switch, but for clarity, I'd rather see pre-allocation followed by assignments Something along this pattern: out - numeric(50) x - sample(3, 50, TRUE) out[x==3] - A out[x==2] -