Problem with rooting tree when imputing missing data

Question

[1713895]

Hi,

I am trying to impute missing values in a data set using the impute.phylo function in phytools.

tree1<-read.nexus("tree1.nex")
hominin_char<-read.csv("hominin_data.csv", header=T, row.names=1)
tree1<-root.phylo(tree1, outgroup = "G_gorilla")
X <- as.data.frame(hominin_char[1:2], row.names=rownames(tree1))
phylo.impute(tree1, X)

and I get the following error:

Error in ape::root.phylo(tree, outgroup = tip) : 
  specified outgroup not in labels of the tree

Below is the data set that I am using.

                         Brain_mass Body_mass
H_neanderthalenis            1353.00     72.20
H_heidelbergensis            1200.00     71.00
H_sapiens                    1450.00     70.60
H_antecessor                  972.00     56.61
H_naledi_195                  501.30     45.90
Asian_H_erectus_153           963.50     57.70
African_H_erectus_DAN5_P1     598.00        NA
African_H_erectus             829.90     64.30
Georgian_H_erectus            758.40     49.50
H_rudolfensis_97              559.20     55.20
H_habilis_106                 559.20     33.30
Au_sediba_93                  363.40     25.80
H_floresiensis_LB1            414.00     28.70
Au_africanus_59               455.30     34.00
P_aethiopicus_67              407.00     31.70
P_bosei_77                    482.70     41.30
P_robustus_89                 525.00     36.00
K_platyops                    407.00        NA
Au_ghari_63                   455.30     34.00
Au_afarensis                  384.70     27.80
Au_afarensis_36               441.70     37.70
Au_afarensis_37               514.30     44.50
Au_afarensis_38               393.10     29.30
Au_anamensis                  365.80     42.00
Ar_ramidus                    300.00     50.00
S_tchadensis                  378.00     40.00
P_troglodytes_4               378.00     50.57
P_troglodytes_5               405.80     58.24
P_troglodytes_6               368.10     42.91
G_gorilla                     454.55    105.00

Can anybody please help?

[Ram]

A couple of points to note:

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