title: How to remove ends of error bars in geom_errorbar
body: <p>I wish to run the following code:</p>
  
  <pre><code>g &lt;- ggplot (df, aes(x=Age, y=RSL, shape = Type)) +
    geom_point() +
    scale_shape_manual(values=c(1,15,5)) + #makes open circle/triangle
    theme(axis.line=element_line(colour = "black", size = 0.5, linetype = "solid")) + # adds solid black x and y axis
    geom_errorbar(aes(ymin=y_min_error, ymax=y_max_error)) + # y error bar
    geom_errorbarh(aes(xmin=x_min_error, xmax=x_max_error)) +
    ylim(0,120) +  # y axis limits
    theme_classic() +
    theme(legend.position="bottom")
  
  g  
  </code></pre>
  
  <p>How can I remove the tick ends on the error bars?</p>
  
  <p>Also, if someone could advise me how I remove the excess space in the code easily, that would be great.  I use <code>dput</code> to extract a sample of my dataframe but whenever I copy the code in the console, I also get lots of extra space.</p>
  
  <p><strong><em>A sample dataframe:</em></strong></p>
  
  <pre><code>df &lt;- structure(list(SITCD = structure(c(3L, 3L, 3L, 3L, 3L, 3L, 3L, 
   3L, 3L, 3L, 3L, 3L, 3L, 3L), .Label = c("GSO/TO", "IKOF", "JL", 
   "MES", "SSD", "USSD"), class = "factor"), Code = structure(c(27L, 
   21L, 3L, 25L, 26L, 20L, 2L, 28L, 230L, 16L, 4L, 10L, 15L, 1L), .Label = c("AAR-2107", 
   "AAR-643", "AAR-644", "AAR-995", "HAR-2956", "HAR-2957", "I-430", 
   "I-431", "I-432", "I-9490", "I-9491", "K-1461", "K-1740", "K-1915", 
   "K-2034", "K-2096", "K-2385", "K-2386", "K-2387", "K-3112", "K-3220", 
   "K-3224", "Lu-1095", "Lu-1103", "LU-3282", "LU-3283", "LU-3284", 
   "LU-3400", "Lu-487", "Lu-489,90", "Lu-491,92", "Lu-528", "Lu-529", 
   "Lu-530", "Lu-531", "Lu-585", "Lu-586", "Lu-608", "Lu-646", "Lu-647", 
   "Lu-648", "Lu-711", "Lu-714", "Lu-766", "Lu-768", "Lu-790", "Lu-792", 
   "Lu-793", "Lu-826", "Lu-827", "Lu-828", "Lu-829", "Lu-830", "Lu-831", 
   "Lu584", "M-1611", "M-1612", "M-1613", "M-1614", "M-1615", "M-1616", 
   "M-1617", "M-1618", "M-1619", "M-1620", "M-1621", "M-1622", "M-1623", 
   "M-1624", "OS-49305", "OS-49306", "OS-49308", "OS-49309", "OS-49311", 
   "OS-49312", "OS-49313", "OS-49314", "OS-49315", "OS-49384", "OS-49385", 
   "OS-49386", "OS-49387", "OS-49403", "OS-49414", "OS-49437", "OS-49440", 
   "OS-49441", "OS-49442", "OS-49493", "OS-49496", "OS-49499", "OS-49502", 
   "OS-49506", "OS-49515", "OS-49516", "OS-49517", "OS-49518", "OS-49519", 
   "OS-49520", "OS-49555", "OS-49558", "OS-49562", "OS-49565", "OS-49578", 
   "OS-49580", "OS-49581", "OS-49582", "OS-49583", "OS-49584", "OS-49605", 
   "OS-49606", "OS-49607", "OS-51568", "OS-51716", "OS-51759", "OS-51760", 
   "OS-51765", "OS-51766", "OS-51767", "OS-51769", "OS-51770", "OS-51774", 
   "OS-51775", "OS-51776", "OS-51845", "OS-51846", "OS-51847", "OS-51874", 
   "OS-51875", "OS-51882", "OS-51883", "OS-51884", "OS-51885", "OS-52112", 
   "OS-52956", "OS-52957", "OS-52962", "OS-52963", "OS-52964", "OS-52966", 
   "OS-52967", "OS-52968", "OS-52969", "OS-52970", "OS-54002", "OS-54004", 
   "OS-54005", "OS-54006", "OS-54007", "OS-54008", "OS-54009", "OS-54045", 
   "OS-54046", "OS-54048", "OS-54073", "OS-54074", "OS-54075", "OS-54076", 
   "OS-54077", "OS-54892", "OS-55609", "OS-55610", "OS-55611", "OS-55612", 
   "OS-55613", "OS-55614", "OS-55724", "OS-55725", "OS-55728", "OS-55729", 
   "OS-55730", "OS-55731", "OS-55732", "OS-55733", "OS-55734", "OS-55735", 
   "OS-55736", "OS-55737", "OS-58249", "OS-58250", "OS-58324", "OS-58325", 
   "OS-58326", "OS-58327", "OS-58509", "OS-58606", "OS-58607", "OS-58609", 
   "OS-58673", "OS-58674", "OS-58701", "OS-58702", "OS-58703", "OS-58704", 
   "OS-58705", "OS-58732", "OS-58735", "OS-59579", "OS-62849", "OS-62850", 
   "OS-62851", "OS-62852", "OS-62855", "OS-62985", "OS-62986", "OS-62992", 
   "OS-62994", "OS-64754", "OS-64755", "OS-64756", "OS-64759", "OS-64760", 
   "OS-64762", "OS-64764", "OS-64765", "OS-64766", "OS-64843", "OS-64844", 
   "OS-64845", "OS-64849", "OS-65398", "OS-65399", "OS-65401", "OS-65405", 
   "OS-65406", "OS-65435", "OS-65436", "OS-65437", "OS-65438", "T-10382", 
   "Unknown", "W-1381", "Y596", "Y599", "Y600", "Y602", "Y702", 
   "Y703", "Y704", "Y708", "Y711", "Y712", "Y713", "Y714", "Y716", 
   "Y717", "Y876", "Y878", "Y879", "Y882", "Y883", "Y884"), class = "factor"), 
   Type = structure(c(3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 
   3L, 3L, 1L, 1L), .Label = c("Above", "At", "Below"), class = "factor"), 
   RSL = c(5, 8, 17.5, 19, 27, 30, 30, 33, 35, 40, 40, 50, 53, 
   70), RSL_error = c(2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 5, 
   2), Age = c(8183.5, 9221.5, 10424.5, 10069, 9092, 10465.5, 
   9204.5, 10531.5, 9844.5, 10073.5, 9905, 9907.5, 11660, 10698.5
   ), age_error = c(232.5, 295.5, 519.5, 371, 323, 377.5, 336.5, 
   324.5, 318.5, 408.5, 327, 380.5, 463, 394.5), x_min_error = c(7951L, 
   8926L, 9905L, 9698L, 8769L, 10088L, 8868L, 10207L, 9526L, 
   9665L, 9578L, 9527L, 11197L, 10304L), x_max_error = c(8416L, 
   9517L, 10944L, 10440L, 9415L, 10843L, 9541L, 10856L, 10163L, 
   10482L, 10232L, 10288L, 12123L, 11093L), y_min_error = c(3, 
   6, 15.5, 17, 25, 28, 28, 31, 33, 38, 38, 48, 48, 68), y_max_error = c(7, 
   10, 19.5, 21, 29, 32, 32, 35, 37, 42, 42, 52, 58, 72)), .Names = c("SITCD", 
   "Code", "Type", "RSL", "RSL_error", "Age", "age_error", "x_min_error", 
   "x_max_error", "y_min_error", "y_max_error"), row.names = c(NA, 
   14L), class = "data.frame")
  </code></pre>