search for: xi7

Hello, I work on the Stochastic Frontier Analysis (SFA) and I am looking for a function in a R package which done the multivariate interpolation. My problem is: For all i=1, ..., n, I have values of (xi1, xi2, ..., xi7)in IR^7 and f(xi1, xi2, ..., xi7)in R and I have also values of (x'i1, x'i2, ..., x'i7) in IR^7 and I need f(x'i1, x'i2, ..., x'i7) in R by interpolation. So x is a (n,7) or a (7,n) matrix and x? is also a matrix with the same format as x. Can someone help me? Thank you in...

...G9lTA$V5LJnJ#jW5Fa0Tbc^fUB1SxXr|l&Rg<t!xg|Qt-%q#5 at Os`<g-EJ z1{V$0&EC?tErNjVa|sXyhNZ^2qC`<bXLBSK^AO)vca%rF?dEEsfWO$<`sz*9heFM{ zy_;!U9O-sD0*8`M6)=rnIzD==GsBA$H>kzq1d~06#xCT3(8b-fl<`pQYS`61ZYHji zrGy_{v@&~l3m5ga&U||Ye&g8gC?d;VA+sq{`qljh`@^&xh at 4fdB7i!oZW)xi7}Ud9 zL82Q&jkRD!0Vf=R`rz293f?FgcX6Ce1mc<9 at KLVAIrR^sjrr+%FIf$3B(L|M*M5+C zpP5rkc%F=Q4Z+!T4e`<15tG*nV>9oWbo2!j70>nxL+0_HDr^U-g&-FXDrHV2Mq0!H zwOd|cS2B!tjoEL+g_XOCyk&)weY7BD<H+cdyc#d#Lv{&_E7I**UYUUTX^u~09M|2X z2HB}T<}MX%DS-6uDXRQ{OJ)s4tmJ2AqgGr9>|~*Lc9f;Jg5VF5T^6...