diff --git a/Get-ExcelColumnName.ps1 b/Get-ExcelColumnName.ps1
new file mode 100644
index 0000000..7562391
--- /dev/null
+++ b/Get-ExcelColumnName.ps1
@@ -0,0 +1,22 @@
+function Get-ExcelColumnName {
+    param(
+        [Parameter(ValueFromPipeline=$true)]
+        $columnNumber=1
+    )
+
+    Process {
+        $dividend = $columnNumber
+        $columnName = @()
+        while($dividend -gt 0) {
+            $modulo      = ($dividend - 1) % 26
+            $columnName += [char](65 + $modulo)
+            $dividend    = [int](($dividend -$modulo)/26)
+        }
+
+        [PSCustomObject] @{
+            ColumnNumber = $columnNumber
+            ColumnName   = $columnName -join ''
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/Get-XYRange.ps1 b/Get-XYRange.ps1
index 9aa0cff..179679d 100644
--- a/Get-XYRange.ps1
+++ b/Get-XYRange.ps1
@@ -1,7 +1,7 @@
 function Get-XYRange {
     param($targetData)
 
-    $record = $targetData| Select-Object -First 1
+    $record = $targetData| select -First 1
     $p=$record.psobject.Properties.name
 
     $infer = for ($idx = 0; $idx -lt $p.Count; $idx++) {
@@ -15,12 +15,12 @@ function Get-XYRange {
             Name         = $name
             Value        = $value
             DataType     = $result.DataType
-            ExcelColumn = [OfficeOpenXml.ExcelAddress]::TranslateFromR1C1("R[1]C[$($idx+1)]", 0 , 0) -replace "\d+", ""  #(Get-ExcelColumnName ($idx + 1)).ColumnName
+            ExcelColumn  = (Get-ExcelColumnName ($idx+1)).ColumnName
         }
     }
 
     [PSCustomObject]@{
-        XRange = $infer | ? {$_.datatype -match 'string'} | Select-Object -First 1 excelcolumn, name
-        YRange = $infer | ? {$_.datatype -match 'int|double'} |Select-Object -First 1 excelcolumn, name
+        XRange = $infer | ? {$_.datatype -match 'string'} | select -First 1 excelcolumn, name
+        YRange = $infer | ? {$_.datatype -match 'int|double'} |select -First 1 excelcolumn, name
     }
 }
\ No newline at end of file