update new data frame

docs/Download.html

@@ -79,11 +79,11 @@
               <div class="col-lg-8 col-lg-offset-2 text-center">
                   <h2 class="section-heading">Download R-Instat</h2>
                   <hr class="light">
-                  <p>If this is your first time downloading R-Instat, we recommend you <a href="http://bit.ly/2Jl5Byo" style="color:blue;" target="_blank">download the Complete Installer</a>. The Complete Installer is the same version of R-Instat as the Basic Installer but also includes the required version of R (3.6.0 currently) to run R-Instat.</p>
+                  <p>If this is your first time downloading R-Instat, we recommend you <a href="http://bit.ly/33O7Z87" style="color:blue;" target="_blank">download the Complete Installer</a>. The Complete Installer is the same version of R-Instat as the Basic Installer but also includes the required version of R (3.6.0 currently) to run R-Instat.</p>
                   <p>If you do not know if you have the latest version of R, download the Complete Installer. The Basic Installer does not include R.</p>
                   <p>R-Instat is currently a Windows only application. However, it can be accessed on Mac or Linux through use of a Virtual Windows Machine.</p>
-                  <p><a href="http://bit.ly/2Jl5Byo" style="color:blue;" target="_blank">R-Instat 0.5.4 Complete Installer (.exe 577MB)</a></p>
-                  <p><a href="http://bit.ly/2ph63H1" style="color:blue;" target="_blank">R-Instat 0.5.4 Basic Installer (.msi 499MB)</a></p>
+                  <p><a href="http://bit.ly/33O7Z87" style="color:blue;" target="_blank">R-Instat 0.5.5 Complete Installer (.exe 594MB)</a></p>
+                  <p><a href="http://bit.ly/2sI7CiE" style="color:blue;" target="_blank">R-Instat 0.5.5 Basic Installer (.msi 516MB)</a></p>
 
                   <h2 class="section-heading">Installation & Documentation</h2>
                   <hr class="light">

instat/clsGridLink.vb

@@ -94,7 +94,7 @@ Public Class clsGridLink
         clsGetCombinedMetadata.SetRCommand(frmMain.clsRLink.strInstatDataObject & "$get_combined_metadata")
         clsSetMetadataChanged.SetRCommand(frmMain.clsRLink.strInstatDataObject & "$set_metadata_changed")
 
-        If frmMain.clsRLink.bInstatObjectExists Then
+        If frmMain.clsRLink.bInstatObjectExists AndAlso frmMain.clsRLink.GetDataFrameCount() > 0 Then
             expTemp = frmMain.clsRLink.RunInternalScriptGetValue(clsDataChanged.ToScript())
             If expTemp IsNot Nothing AndAlso expTemp.Type <> Internals.SymbolicExpressionType.Null Then
                 bRDataChanged = expTemp.AsLogical(0)

instat/clsRLink.vb

@@ -444,6 +444,7 @@ Public Class RLink
         Dim clsPNGFunction As New RFunction
         Dim strTempAssignTo As String = ".temp_val"
         Dim bSuccess As Boolean
+        Dim bError As Boolean = False
 
         strTempGraphsDirectory = System.IO.Path.Combine(System.IO.Path.GetTempPath() & "R_Instat_Temp_Graphs")
         strOutput = ""
@@ -558,7 +559,7 @@ Public Class RLink
                 strSplitScript = Left(strScript, strScript.Trim(Environment.NewLine.ToCharArray).LastIndexOf(Environment.NewLine.ToCharArray))
                 If strSplitScript <> "" Then
                     Try
-                        Evaluate(strSplitScript, bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride)
+                        bError = Not Evaluate(strSplitScript, bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride)
                     Catch e As Exception
                         MsgBox(e.Message & Environment.NewLine & "The error occurred in attempting to run the following R command(s):" & Environment.NewLine & strScript, MsgBoxStyle.Critical, "Error running R command(s)")
                     End Try
@@ -567,12 +568,16 @@ Public Class RLink
                 strCapturedScript = "capture.output(" & strSplitScript & ")"
             End If
             Try
-                Evaluate(strTempAssignTo & " <- " & strCapturedScript, bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride)
-                expTemp = GetSymbol(strTempAssignTo)
-                If expTemp IsNot Nothing Then
-                    strTemp = String.Join(Environment.NewLine, expTemp.AsCharacter())
-                    If strTemp <> "" Then
-                        strOutput = strOutput & strTemp & Environment.NewLine
+                If Not bError Then
+                    If Evaluate(strTempAssignTo & " <- " & strCapturedScript, bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride) Then
+                        expTemp = GetSymbol(strTempAssignTo)
+                        Evaluate("rm(" & strTempAssignTo & ")", bSilent:=True)
+                        If expTemp IsNot Nothing Then
+                            strTemp = String.Join(Environment.NewLine, expTemp.AsCharacter())
+                            If strTemp <> "" Then
+                                strOutput = strOutput & strTemp & Environment.NewLine
+                            End If
+                        End If
                     End If
                 End If
             Catch e As Exception
@@ -592,27 +597,27 @@ Public Class RLink
         End If
     End Sub
 
-    Public Function RunInternalScriptGetValue(strScript As String, Optional strVariableName As String = ".temp_value", Optional bSilent As Boolean = False, Optional bSeparateThread As Boolean = True, Optional bShowWaitDialogOverride As Nullable(Of Boolean) = Nothing) As SymbolicExpression
+    Public Function RunInternalScriptGetValue(strScript As String, Optional strVariableName As String = ".temp_value", Optional bSilent As Boolean = False, Optional bSeparateThread As Boolean = True, Optional bShowWaitDialogOverride As Nullable(Of Boolean) = Nothing, Optional ByRef strError As String = "") As SymbolicExpression
         Dim expTemp As SymbolicExpression
         Dim strCommand As String
 
         expTemp = Nothing
         'TODO Bug here if strScript is multiple lines. Wrong value will be returned
-        strCommand = strVariableName & "<-" & strScript
+        strCommand = strVariableName & " <- " & strScript
         If clsEngine IsNot Nothing Then
-            Evaluate(strCommand, bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride)
+            Evaluate(strCommand, bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride, strError:=strError)
             expTemp = GetSymbol(strVariableName, bSilent:=True)
             'Very important to remove the variable after getting it othewise could be returning wrong variable later if a command gives an error
             Evaluate("rm(" & strVariableName & ")", bSilent:=bSilent, bSeparateThread:=bSeparateThread)
         End If
         Return expTemp
     End Function
 
-    Public Function RunInternalScriptGetOutput(strScript As String, Optional bSilent As Boolean = False, Optional bSeparateThread As Boolean = True, Optional bShowWaitDialogOverride As Nullable(Of Boolean) = Nothing) As CharacterVector
+    Public Function RunInternalScriptGetOutput(strScript As String, Optional bSilent As Boolean = False, Optional bSeparateThread As Boolean = True, Optional bShowWaitDialogOverride As Nullable(Of Boolean) = Nothing, Optional ByRef strError As String = "") As CharacterVector
         Dim chrTemp As CharacterVector
         Dim expTemp As SymbolicExpression
 
-        expTemp = RunInternalScriptGetValue("capture.output(" & strScript & ")", bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride)
+        expTemp = RunInternalScriptGetValue("capture.output(" & strScript & ")", bSilent:=bSilent, bSeparateThread:=bSeparateThread, bShowWaitDialogOverride:=bShowWaitDialogOverride, strError:=strError)
         Try
             chrTemp = expTemp.AsCharacter()
         Catch ex As Exception
@@ -641,14 +646,15 @@ Public Class RLink
         End If
     End Function
 
-    Private Function Evaluate(strScript As String, Optional bSilent As Boolean = False, Optional bSeparateThread As Boolean = True, Optional bShowWaitDialogOverride As Nullable(Of Boolean) = Nothing) As Boolean
+    Private Function Evaluate(strScript As String, Optional bSilent As Boolean = False, Optional bSeparateThread As Boolean = True, Optional bShowWaitDialogOverride As Nullable(Of Boolean) = Nothing, Optional ByRef strError As String = "") As Boolean
         Dim thrRScript As Threading.Thread
         Dim thrDelay As Threading.Thread
         Dim thrWaitDisplay As Threading.Thread
         Dim evtWaitHandleWaitDisplayDone As New System.Threading.AutoResetEvent(False)
         Dim evtWaitHandleDelayDone As New System.Threading.AutoResetEvent(False)
         Dim bReturn As Boolean = True
         Dim i As Integer = 1
+        Dim strTempError As String = ""
         Dim strTempFile As String
         Dim bErrorMessageOpen As Boolean = False
         Dim bCurrentShowWaiting As Boolean
@@ -716,6 +722,7 @@ Public Class RLink
                                                                   MsgBox(ex.Message & Environment.NewLine & "The error occurred in attempting to run the following R command(s):" & Environment.NewLine & strScript, MsgBoxStyle.Critical, "Error running R command(s)")
                                                                   bErrorMessageOpen = False
                                                               End If
+                                                              strTempError = ex.Message
                                                               bReturn = False
                                                           End Try
                                                       End Sub)
@@ -758,12 +765,14 @@ Public Class RLink
                 If Not bSilent Then
                     MsgBox(ex.Message & Environment.NewLine & "The error occurred in attempting to run the following R command(s):" & Environment.NewLine & strScript, MsgBoxStyle.Critical, "Error running R command(s)")
                 End If
+                strTempError = ex.Message
                 bReturn = False
             End Try
         Else
             bReturn = False
         End If
         bRCodeRunning = False
+        strError = strTempError
         Return bReturn
     End Function
 
@@ -1078,6 +1087,21 @@ Public Class RLink
         Return bExists
     End Function
 
+    Public Function GetDataFrameCount() As Integer
+        Dim iCount As Integer
+        Dim clsDataFrameCount As New RFunction
+        Dim expCount As SymbolicExpression
+
+        clsDataFrameCount.SetRCommand(strInstatDataObject & "$dataframe_count")
+        expCount = RunInternalScriptGetValue(clsDataFrameCount.ToScript(), bSilent:=True)
+        If expCount IsNot Nothing AndAlso Not expCount.Type = Internals.SymbolicExpressionType.Null Then
+            iCount = expCount.AsInteger(0)
+        Else
+            iCount = 0
+        End If
+        Return iCount
+    End Function
+
     Public Function GetDataFrameLength(strDataFrameName As String, Optional bUseCurrentFilter As Boolean = False) As Integer
         Dim iLength As Integer
         Dim clsDataFrameLength As New RFunction