revise description and title; add cran-comments to test various OS

Author: ngthomas

.gitignore

@@ -1,3 +1,5 @@
+Meta
+doc
 .Rproj.user
 .Rhistory
 .RData

.travis.yml

@@ -5,6 +5,9 @@ sudo: false
 cache: packages
 warnings_are_errors: true
 
+os:
+  - linux
+  - osx
 
 addons:
   apt:

DESCRIPTION

@@ -1,12 +1,11 @@
 Package: microhaplot
 Type: Package
-Title: short read variant visualizer
-Version: 0.1.0
+Title: microhaplotype constructor and visualizer
+Version: 1.0.0.9000
 Authors@R: person("Thomas", "Ng", email = "tngthomasng@gmail.com", role = c("aut", "cre"))
-Description: This package has two main functions: 1) to extract microhaplotype from
-    individual-based alignment and variant files, specifically from SAM and VCF files
-    2) to call and curate microhaplotypes with the aid of simple filter criteria and
-    summaries plot found in the Shiny App interface.
+Description: This package 1) constructs microhaplotype from short read sequences, specifically
+    from sequence alignment - SAM and variant call - VCF files, and 
+    2) assists the curation of observed microhaplotypes through Shiny interface.
 Depends:
     R (>= 3.1.2)
 Encoding: UTF-8

cran-comments.md

@@ -0,0 +1,14 @@
+## Test environments
+* local OS X install, R 3.5.3
+* ubuntu 12.04 (on travis-ci), R 3.1.2: checked
+* win-builder (devel and release): unchecked
+
+## R CMD check results
+── R CMD check results ───────────────────────────── microhaplot 1.0.0.9000 ────
+Duration: 15.8s
+
+0 errors ✔ | 0 warnings ✔ | 0 notes ✔
+
+
+## Downstream dependencies
+There are currently no downstream dependencies for this package

inst/shiny/microhaplot/server.R

@@ -1082,7 +1082,7 @@ while the bottom panel hosts a wide selection of tables and graphical summaries.
 
     #cat(file=stderr(), "successfull pass on haplo.sum --- ", dim(haplo.sum),"=--\n")
 
-    if (is.null(haplo.sum))
+    if (is.null(haplo.sum) || dim(haplo.sum)[1] ==0)
       return ()
 
     haplo.join.ar <- left_join(haplo.sum,