[R] interpolation issue

[uday]

hi Petr ,
Thanks for replay and sorry for typo mistake 
approx(pres, sci.pre)  its nothing but approx(pre2, pre1). 

so for more simplicity 
x <- c(10.34615 , 52.02116, 146.17357, 243.28644, 347.41504, 431.67105,
             521.42712, 629.00446 ,729.95941, 827.86279, 921.55078,
956.44446)
y <- c( 983.4477692, 973.6199013, 958.0722141, 938.8194208 ,915.1833983,
852.1671089, 
             765.0037479,654.0372907, 526.7369169, 397.0581990, 279.9788079,
229.5127059,
             185.2578164 ,147.2534510,115.1949457,  88.5712513,  66.7337287, 
49.0140828,
             23.3535195 ,  0.6609724)
approx(x,y,xout=x,method="linear")
still I get error message 
Error in xy.coords(x, y) : 'x' and 'y' lengths differ

I saw the approx. function , but yet I do not know that how we can use that
for the data set which having different length 

So I hope that my problem is bit more clear than before

Cheers 
Uday 




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