也有不同之处,一是use.names参数,可以指定是否使用相同列名bind,二是rbindlist可以使用在不知道对象名字的情况下,比如lapply(fileNames, fread) 。 rbindlist(l, use.names=fill, fill=FALSE, idcol=NULL) l对象列表,也可以分开写 use.names如果TRUE, bind的时候匹配行名,默认FALS
"four", "five") # 创建一个字符串向量 > name(x) # 显示向量x的名字(其实就像是Excel中的表头) Error in name(x) : could not find function "name" > name(x) <- y # 将向量y作为向量x的名字 Error in name(x) <- y : could not find function "name<-" > names(x) # 显示向量x的名...
and abbreviated variable names 1: hair_color, ## # 2: skin_color, 3: eye_color, 4: birth_year, 5: homeworld #闭区间 df_dup %>% filter(between(height, 170, 188)) # 闭区间 ## # A tibble: 28 x 14 ## name height mass hair_~1 skin_~2 eye_c~3 birth~4 sex gender...
(data$Marker == 1, as.character(data$Name), '') # (或)标记方式(二) # 根据PValue小于多少和log[2]FC的绝对值大于多少筛选出合适的点 # PvalueLimit = 0.0001 # FCLimit = 5 # data$label=ifelse(data$PValue < PvalueLimit & abs(log2(data$FC)) >= FCLimit, as.character(data$Name)...
Variable scoping error when you use the transformFunc parameter To transform data while you are modeling, you can pass atransformFuncargument in a function such asrxLinmodorrxLogit. However, nested function calls can lead to scoping errors in the SQL Server compute context, even if the calls ...
etree.fromstring(rsp_data) namespaces = {'file-operation': 'urn:huawei:yang:huawei-file-operation'} mpath = '{}'.format('dir') for file_tmp in root_elem.findall(mpath, namespaces): file_name = file_tmp.find("file-name", namespaces) elem = file_tmp.find("dir-name", namespaces) ...
bcp "exec RPlotHistogram" queryout "plot.jpg" -S <SQL Server instance name> -d NYCTaxi_Sample -U <user name> -P <password> -T 注意 bcp 的命令參數區分大小寫。 如果連接成功,系統會提示您輸入圖形檔格式的詳細資訊。 在每個提示字元下,按 ENTER 接受預設值,但不包括這些變更: 針對prefix-lengt...
thanks! I am trying to use this in a for loop and would like to find a way to call this “dynamic” variable by a “universal” name. Could you help me with this? for(Var in unique(df$Group)) { assign(paste(“T1_”, Var, sep = “”), median(filter(df, Group == Var)$...
默认情况下,数据集中的字符串(String)会被视为因子(Factor)处理,此时可以设置stringAsFactors = FALSE,将文本变量视为字符串表示。 读取xlsx和xls文件:packagexlsx(Java)和gdata(Perl) foreign:read.spss;read.octave;read.systat;read.xport;read.dta
registerClassAlias(aliasName:String, classObject:Class)— 套件函數, flash.net 當物件以 Action Message Format (AMF) 編碼時,會保留該物件的類別 (類型)。 registerClassAliases() — 靜態方法 , 類別 mx.utils.RpcClassAliasInitializer In the event that an application does not use the Flex UI classes wh...