title: Error: Column named '1640233800' cannot be found in 'df'
body: <p>I'm using <strong>R</strong> and <strong>moveVis</strong> package of R to do some movement visualization. Below is the csv from where I import the data using <strong>read.csv</strong></p>
  <p>I'm having trouble converting the data.frame to <strong>moveStack</strong> using <strong>df2move</strong></p>
  <pre><code>trackId,x,y,time,x1,x2,optional,sensor,timestamps
  A34,19.00094708496841,72.8264388198447,2021-12-23 10:00:00,19.00094708496841,72.8264388198447,FALSE,unknown,2021-12-23 10:00:00
  A34,18.986663359819435,72.84012881354482,2021-12-23 10:02:00,18.986663359819435,72.84012881354482,FALSE,unknown,2021-12-23 10:02:00
  </code></pre>
  <pre><code>raw_data &lt;- read.csv(&quot;mdata2.csv&quot;, header = TRUE)
  m &lt;- df2move(raw_data, proj = &quot;+init=epsg:4326 +proj=longlat +datum=WGS84 +no_defs&quot;, x = &quot;x1&quot;, y = &quot;x2&quot;, time = as.POSIXct(raw_data$timestamps, format = &quot;%Y-%m-%d %H:%M:%S&quot;, tz = &quot;UTC&quot;), track_id = &quot;trackId&quot;)
  </code></pre>
  <p>Getting this error on running above code</p>
  <blockquote>
  <p>Error: Column named '1640233800' cannot be found in 'df'</p>
  </blockquote>