diff --git a/.Rproj.user/9DAE6990/pcs/files-pane.pper b/.Rproj.user/9DAE6990/pcs/files-pane.pper
index c191ada4d25fa0fda4ce490c5f322d65499417ad..aa3d96db46890d28bf29c222a803e29f24a8bdd7 100644
--- a/.Rproj.user/9DAE6990/pcs/files-pane.pper
+++ b/.Rproj.user/9DAE6990/pcs/files-pane.pper
@@ -1,5 +1,5 @@
 {
-    "path" : "~/Documents/PhD/stuart_package/stuart",
+    "path" : "~/Documents/PhD/stuart_package/stuart/vignettes",
     "sortOrder" : [
         {
             "ascending" : true,
diff --git a/.Rproj.user/9DAE6990/pcs/source-pane.pper b/.Rproj.user/9DAE6990/pcs/source-pane.pper
index 1743e40fec30e357993d33f5cb053bf027524dc8..70829f67631c05a34ae267bf4377c69a6b3ef1c1 100644
--- a/.Rproj.user/9DAE6990/pcs/source-pane.pper
+++ b/.Rproj.user/9DAE6990/pcs/source-pane.pper
@@ -1,3 +1,3 @@
 {
-    "activeTab" : 0
+    "activeTab" : 1
 }
\ No newline at end of file
diff --git a/.Rproj.user/9DAE6990/pcs/windowlayoutstate.pper b/.Rproj.user/9DAE6990/pcs/windowlayoutstate.pper
index ac401d322000bedd2dd11fee63a3fc025f9da7ee..c0a45770f2e927d61932d2d7ec44eb5df148f3f6 100644
--- a/.Rproj.user/9DAE6990/pcs/windowlayoutstate.pper
+++ b/.Rproj.user/9DAE6990/pcs/windowlayoutstate.pper
@@ -1,13 +1,13 @@
 {
     "left" : {
-        "panelheight" : 1402,
-        "splitterpos" : 362,
-        "topwindowstate" : "NORMAL",
-        "windowheight" : 1440
+        "panelheight" : 762,
+        "splitterpos" : 196,
+        "topwindowstate" : "MAXIMIZE",
+        "windowheight" : 800
     },
     "right" : {
         "panelheight" : 1402,
-        "splitterpos" : 879,
+        "splitterpos" : 878,
         "topwindowstate" : "NORMAL",
         "windowheight" : 1440
     }
diff --git a/.Rproj.user/9DAE6990/pcs/workbench-pane.pper b/.Rproj.user/9DAE6990/pcs/workbench-pane.pper
index a729e387a19b91f4e513ea26cf9b52c3ac4a943d..b9fcffa7969da03fcda0fc797bd2d2041388fd6e 100644
--- a/.Rproj.user/9DAE6990/pcs/workbench-pane.pper
+++ b/.Rproj.user/9DAE6990/pcs/workbench-pane.pper
@@ -1,6 +1,6 @@
 {
     "TabSet1" : 1,
-    "TabSet2" : 0,
+    "TabSet2" : 3,
     "TabZoom" : {
     }
 }
\ No newline at end of file
diff --git a/R/tab_mark.R b/R/tab_mark.R
index e76f795053748bb99cd25243079a1c8b5fa6e0d5..3cc24c9c4c2011a9b6bd5029cb85fa10b0407560 100755
--- a/R/tab_mark.R
+++ b/R/tab_mark.R
@@ -15,11 +15,11 @@
 ## create table with markers and counts
 tab_mark <- function(geno,annot,pos){
   #stop if no annot or pos
-  if(rapportools::is.empty(annot)==FALSE){
+  if(all(rapportools::is.empty(annot)==TRUE)){
     stop("No annotation data")
   }
 
-  if(rapportools::is.empty(pos)==FALSE){
+  if(rapportools::is.empty(pos)==TRUE){
     stop("No position data")
   }