Caros, boa tarde, Eu estou fazendo um ajuste não linear usando nls mas o resultado que ele dá é uma curva de ajuste com concavidade invertida da que eu preciso. Já tentei usar o gnm() mas não consegui, fiquei confusa. Alguém poderia me dar uma dica? Muito obrigada, Michelle
dput(meanCurtose) c(12.6411612236072, 12.4796294865894, 11.7837399107729, 9.3366244767958, 8.78234352198318, 8.80804015042667, 7.95307495971197, 7.32343842457161, 8.14299654574164, 7.70975671017602, 8.18694316251001, 7.80329447515565, 7.34631424875244, 7.36272816078658, 7.51141407180884, 7.2984543038216, 7.18798034231446, 7.39050028173958, 7.38081189490019, 6.95713316227877, 7.63791968455754, 7.87986509970493, 7.73055700377501, 7.70222565081336, 7.30022411141346, 7.4083910760296, 8.00578570236547, 7.93193221955052, 6.64327337064239, 6.68647106547987, 6.3000528994051, 6.54137808760309, 7.48995510261887, 6.54309655530203, 7.52087344933623, 7.42164647655176, 6.92162268458166, 7.77143984793159, 7.20394459256519, 7.83235593399696, 6.83302649488445, 7.62258779095348, 6.38055427433855, 8.05998045599357, 7.46958190677157, 7.60765302681021, 8.80234303007986, 6.68187705863027, 8.21926338640429, 7.08617024720737, 7.08317235004987, 7.41892957604937, 7.16982143599, 8.15539571232209, 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4.97657133718324, 10.8727474295956, 11.4568422631567) x<-c(1:391) xx2<-c(269:380) yy2<-meanCurtose[269:380]
ajuste1<-nls(yy2~9.548-b*(xx2-268)^c,start=list(b=1,c=1))
plot(x,meanCurtose) lines(c(269:380),((predict(ajuste1))),col="blue",lwd=5)