added r-cmd badge

Author: lsteinmann

.github/.gitignore

@@ -0,0 +1 @@
+*.html

.github/workflows/R-CMD-check.yaml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+name: R-CMD-check
+
+jobs:
+  R-CMD-check:
+    runs-on: macOS-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: r-lib/actions/setup-r@master
+      - name: Install dependencies
+        run: |
+          install.packages(c("remotes", "rcmdcheck"))
+          remotes::install_deps(dependencies = TRUE)
+        shell: Rscript {0}
+      - name: Check
+        run: rcmdcheck::rcmdcheck(args = "--no-manual", error_on = "error")
+        shell: Rscript {0}

README.md

@@ -1,4 +1,8 @@
 <!-- README.md is generated from README.Rmd. Please edit that file -->
+ <!-- badges: start -->
+  [![R build status](https://github.com/lsteinmann/datplot/workflows/R-CMD-check/badge.svg)](https://github.com/lsteinmann/datplot/actions)
+  <!-- badges: end -->
+
 datplot
 =======