lapply和BioMart的另一个问题

我最近问了一个关于lapply的问题，但现在我改变了我的方法，遇到了更多我无法解决的问题

这是我遇到问题的代码：

装载生物零件

library(biomaRt)

做海皮斯超市

ensembl_hsapiens <- useMart("ensembl", 
                        dataset = "hsapiens_gene_ensembl")

代码的工作原理如下：

all_homologues <- getBM(attributes = c("ensembl_gene_id", "external_gene_name",  
                               "mmusculus_homolog_ensembl_gene", 
                               "mmusculus_homolog_associated_gene_name"),
                           filters = "ensembl_gene_id",
                           values = c(ensembl_gene_ID),
                           mart = ensembl_hsapiens)

---

all_homologues在使用它之后，我通过使用以下工具使其正常工作：

all_homologues <- lapply(species, function(s) getBM(attributes = c("ensembl_gene_id", 
                                                               "external_gene_name", 
                                                               paste0(s, c("_homolog_ensembl_gene",
                                                                           "_homolog_associated_gene_name"))),
                                                filters = "ensembl_gene_id",
                                                values = c(ensembl_gene_ID),
                                                mart = ensembl_hsapiens))

所有_同系物
all_homologues <- lapply(species, function(s) getBM(attributes = c("ensembl_gene_id", 
                                                               "external_gene_name", 
                                                               get(paste0(s, "_homolog_ensembl_gene")), 
                                                               get(paste0(s, "_homolog_associated_ensembl_gene")), 
                                                               filters = "ensembl_gene_id", 
                                                               values = c(ensembl_gene_ID), 
                                                               mart = ensembl_hsapiens)))

 Error in martCheck(mart) : 
  You must provide a valid Mart object. To create a Mart object use the function: useMart.  Check ?useMart for more information.

all_homologues <- getBM(attributes = c("ensembl_gene_id", "external_gene_name",  
                               "mmusculus_homolog_ensembl_gene", 
                               "mmusculus_homolog_associated_gene_name"),
                           filters = "ensembl_gene_id",
                           values = c(ensembl_gene_ID),
                           mart = ensembl_hsapiens)

all_homologues <- lapply(species, function(s) getBM(attributes = c("ensembl_gene_id", 
                                                               "external_gene_name", 
                                                               paste0(s, c("_homolog_ensembl_gene",
                                                                           "_homolog_associated_gene_name"))),
                                                filters = "ensembl_gene_id",
                                                values = c(ensembl_gene_ID),
                                                mart = ensembl_hsapiens))