r

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Using nnet for prediction, am i doing it right?

I\'m still pretty new to R and AI / ML techniques. I would like to use a neural net for prediction, and since I\'m new I would just like to see if this is how it should be done.[详细]

2023-04-12 08:36 分类：问答
Relative error between two matrices

Given two float matrices in R, I would like to get the relative error between every entry, and th开发者_如何学JAVAen among all errors search the max of all of them and compare it against 10%, i.e. MAX[详细]

2023-04-12 08:14 分类：问答
Optimal database design in terms of query speed to store matrices from R

I have hundreds of matrices that need to be used in R and most of them are around 45000x350 each. What I\'d like to do is find an optimal database software choice and schema to store the data in and b[详细]

2023-04-12 07:42 分类：问答
Using column numbers not names in lm()

Instead of something like lm(bp~height+age, data=mydata) I would like 开发者_运维技巧to specify the columns by number, not name.[详细]

2023-04-12 07:40 分类：问答
How can I extract plot axes' ranges for a ggplot2 object?

I have an object from ggplot2, say myPlot, h开发者_运维技巧ow can I identify the ranges for the x and y axes?[详细]

2023-04-12 07:38 分类：问答
Obtaining index names from a by object by parsing its call

I\'m trying to create an as.data.frame.by method which basically melts the N-dimensional by object for use with latex.table.by.[详细]

2023-04-12 07:29 分类：问答
Merging in R - merging what is similar...easy

I have two data frames like so: AB 16 27 54 33 9开发者_如何学Python9 and the other one: AC 15 59 31 91 and I want to merge them to create[详细]

2023-04-12 07:20 分类：问答
Plotting several groups of box plots side-by-side in R

I am trying to plot two box-plots 开发者_如何学编程in the same plot, each within the same category.[详细]

2023-04-12 05:50 分类：问答
Joining lists then making boxplots

Let\'s say that I have got two lists: temp<-c(\"con.sin.results\",\"sin.results\",\"exp.results\") Temp<-c(\"[,1:16]\",\"[,17:32]\",\"[,33:48]\",\"[,49:64]\")[详细]

2023-04-12 04:50 分类：问答
Replacing NAs with latest non-NA value

In a data.frame (or data.table), I would like to "fill forward" NAs with the closest previous non-NA value. A simple example, using vectors (instead of a data.frame) 开发者_开发百科is the fo[详细]

2023-04-12 04:44 分类：问答