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    I perform GBM models. Data sample a=structure(list(yield = c(1842L, 2147L, 2444L, 3850L, 1866L, 2897L ... /calculate-r-square-multiple-determination-coefficient-using-gbm-in-r...
asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have 10 elements with their serial number and x,y,z coordinates in their initial and final position : data0 and data1 respectively. I ... dw/dz; Ex = a1; Ey = b2; Ez = c3;...
asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    i would like to calculate the age of users from a column (YOB) which contain only the year of birthday ? i've tried ... X - YOB from dataset.table; Could you help please ? Thanks!...
asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    i would like to calculate the age of users from a column (YOB) which contain only the year of birthday ? i've tried ... X - YOB from dataset.table; Could you help please ? Thanks!...
asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)
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