title: Error in printing data.frame in excel using XLSX package in R
body: <p>The dataframe is visible with out any error. But when the same is printed using write.xlsx fucnction of the package XLSX, it gives the error.</p>
  
  <pre><code>Error in .jcall(cell, "V", "setCellValue", value) : 
    method setCellValue with signature ([D)V not found.
  </code></pre>
  
  <p>The dput of the data.frame looks like:</p>
  
  <pre><code>Timestamp         qs          pqs        logqs         es         p_imp      dep    r_dep       agg_rtn
                 (time)      (dbl)        (dbl)        (dbl)      (dbl)         (dbl)    (dbl)    (dbl)         (dbl)
  1 2015-05-04 09:29:59 0.05788732 0.0007478696 0.0007478545 0.09633803 -0.0446830986 3533.518 274079.9 -0.0006432937
  2 2015-05-04 10:00:00 0.04948394 0.0006362707 0.0006362707 0.07586009  0.0088016055 2416.431 187953.1  0.0000000000
  3 2015-05-04 10:30:00 0.05554795 0.0007142532 0.0007142532 0.06417808 -0.0002739726 3245.574 252422.0  0.0000000000
  4 2015-05-04 10:59:59 0.04863014 0.0006194244 0.0006194244 0.08434442  0.0024951076 3563.401 279503.9  0.0000000000
  5 2015-05-04 11:30:00 0.05761986 0.0007319037 0.0007319037 0.07851027  0.0154965753 2010.943 158429.1 -0.0006339144
  6 2015-05-04 12:00:00 0.04957627 0.0006285051 0.0006285051 0.07025424  0.0070762712 1819.908 143546.0  0.0000000000
  Variables not shown: vol_30_sum (dbl), vol_30_mean (dbl), p_return_sqr (dbl), p_return_mean (dbl), Lim_or_out (dbl),
    closing_price (dbl), closing_vol (dbl)
  </code></pre>
  
  <p>Kindly help in resolving this error.</p>