The names (column names) of the first dataframe do not match the names of the second one. Just as the error message says.

    &gt; identical(names(xd.small[[1]]), names(xd.small[[2]]) )
    [1] FALSE

If you do not care about the names of the 3rd or 4th columns of the second df, you can coerce them to be the same:

    &gt; names(xd.small[[1]]) &lt;- names(xd.small[[2]]) 
    &gt; identical(names(xd.small[[1]]), names(xd.small[[2]]) )
    [1] TRUE

Then things should proceed happily.

easy enough to use the `unname()` function:

    data.frame &lt;- unname(data.frame)

`rbind()` needs the two object names to be the same. For example, the first object names: `ID Age`, the next object names: `ID  Gender`,if you want to use `rbind()`, it will print out:

&gt; names do not match previous names

Use code as follows:

    mylist &lt;- lapply(pressure, function(i)read.xlsx(i,colNames = FALSE))#
    mydata &lt;- do.call(&#39;rbind&#39;,mylist)#




For some reason I cannot use functions attached to the object I want to use. I added a comment to the line that is not working. As an error I get &quot;Error; pointer to incomplete class type is not allowed&quot; Please help

This is code in dokter.ccp

	int counter = 0;		
	for (list&lt;Wielrenner*&gt;::iterator it = wielrenners.begin(); it != wielrenners.end(); it++){
		Wielrenner* wielrennerOB = *it;
		cout &lt;&lt; &quot;\nID: &quot; &lt;&lt; counter;
		cout &lt;&lt; &quot;List size: &quot; &lt;&lt; persons.size() &lt;&lt; endl;
		
		wielrennerOB-&gt;print();  // This is not working
		counter++;
	 }	

This is code in wielrenner.h

    #ifndef WIELRENNER_H_

    #define WIELRENNER_H_

    //#include &lt;fstream&gt;
 
    #include &quot;persoon.h&quot;

    #include &quot;Onderzoek.h&quot;

    class Wielrenner :
	public Persoon
    {
    public:
	    Wielrenner(string, string, Adres, string, Datum, Datum, string, int, float, float, float,list&lt;Onderzoek&gt;* );
	    ~Wielrenner(void);
		int		getLengte() const;
		float	getGewicht() const;
		float	getVo2max() const;
		float	getMaxVermogen() const;
		list&lt;Onderzoek&gt;	getOnderzoekenList();

		void	setLengte(int);
		void	setGewicht(float);
		void	setVo2max(float);
		void	setMaxVermogen(float);
		void	voegOnderzoekToeList(Onderzoek);
		void	showOnderzoeksList();
		void	setOnderzoeksLijst(list&lt;Onderzoek&gt;&amp;);
		void	print();
		void	printFile(ofstream&amp;);


    private:
	int		lengte;
	float	gewicht;
	float	vo2max;
	float	maxVermogen;
	list&lt;Onderzoek&gt; onderzoeken;
    };

    #endif /* WIELRENNER_H_ */

code in wielrenner.CCP

    using namespace std;
    #include &lt;string&gt;

    #include &quot;Wielrenner.h&quot;
    /*
    #include &quot;Onderzoek.h&quot;

    */
    Wielrenner::Wielrenner(string voornaam, string achternaam, Adres adres, string telefoon, Datum datumInDienst, Datum geboorteDatum, 
						string persoonType, int lengte, float gewicht, float vo2max, float maxVermogen,list&lt;Onderzoek&gt;* onderzoeken)
    		: lengte(lengte), 
		gewicht(gewicht), 
		vo2max(vo2max), 
		maxVermogen(maxVermogen),
		Persoon(voornaam, achternaam, adres, telefoon, datumInDienst, geboorteDatum, persoonType)
    {
    }


    Wielrenner::~Wielrenner(void)
    {
    }

    //setten van gegevens
    void	Wielrenner::setLengte(int newLengte){
	lengte = newLengte;
    }
    void	Wielrenner::setGewicht(float newGewicht){
	gewicht = newGewicht;
    }
    void	Wielrenner::setVo2max(float newVo2max){
	vo2max = newVo2max;
    }
    void	Wielrenner::setMaxVermogen(float newMaxVermogen){
	maxVermogen = newMaxVermogen;
    }
    void	Wielrenner::voegOnderzoekToeList(Onderzoek newOnderzoek){
	onderzoeken.push_back(newOnderzoek);			
    }

    void	Wielrenner::showOnderzoeksList(){
	int teller=0;
	
	for (list&lt;Onderzoek&gt;::iterator it = onderzoeken.begin(); it != onderzoeken.end();     it++){
		Onderzoek onderzoekOB = *it;
		cout &lt;&lt; teller &lt;&lt; &quot; - &quot;;
		onderzoekOB.print();
		teller++;
	 }	
    }

    void	Wielrenner::setOnderzoeksLijst(list&lt;Onderzoek&gt;&amp; newOnderzoeksLijst){
	onderzoeken = newOnderzoeksLijst;
    }

    void	Wielrenner::print(){

	cout &lt;&lt; &quot;(&quot; &lt;&lt; persoonID &lt;&lt; &quot;) Persoon: &quot; &lt;&lt; endl;
	cout &lt;&lt; persoonType &lt;&lt; endl;
	cout &lt;&lt; voornaam &lt;&lt; &quot; &quot; &lt;&lt; achternaam &lt;&lt; endl;
	adres.print();
	cout &lt;&lt; telefoon &lt;&lt; endl;
	cout &lt;&lt; &quot;Datum in dienst: &quot;;
	datumInDienst.print();
	cout &lt;&lt; &quot;Geboortedatum: &quot;;
	geboorteDatum.print();
	cout &lt;&lt; &quot;&gt; Extra wielrenner gegevens: &quot; &lt;&lt; endl;
	cout &lt;&lt; &quot;Lengte: &quot; &lt;&lt; lengte &lt;&lt; endl;
	cout &lt;&lt; &quot;Gewicht: &quot; &lt;&lt; gewicht &lt;&lt; endl;
	cout &lt;&lt; &quot;vo2max: &quot; &lt;&lt; vo2max &lt;&lt; endl;
	cout &lt;&lt; &quot;maxVermogen: &quot; &lt;&lt; maxVermogen &lt;&lt; endl;
    }
    void Wielrenner::printFile(ofstream &amp;myfile){

	myfile &lt;&lt;  persoonID &lt;&lt; &quot;\n&quot;;
	myfile &lt;&lt; persoonType &lt;&lt; &quot;\n&quot;;
	myfile &lt;&lt; voornaam &lt;&lt; &quot; &quot; &lt;&lt; achternaam &lt;&lt; &quot;\n&quot;;
	adres.printFile(myfile);
	myfile &lt;&lt; telefoon &lt;&lt; &quot;\n&quot;;
	datumInDienst.printFile(myfile);
	geboorteDatum.printFile(myfile);
	myfile &lt;&lt; lengte &lt;&lt; &quot;\n&quot;;
	myfile &lt;&lt; gewicht &lt;&lt; &quot;\n&quot;;
	myfile &lt;&lt; vo2max &lt;&lt; &quot;\n&quot;;
	myfile &lt;&lt; maxVermogen &lt;&lt; &quot;\n&quot;;
    }
    // returnen van gegevens

    int		Wielrenner::getLengte() const{
	return lengte;
    }
    float	Wielrenner::getGewicht() const{
	return gewicht;
    }
    float	Wielrenner::getVo2max() const{
	return vo2max;
    }	
    float	Wielrenner::getMaxVermogen() const{
	return maxVermogen;
    }
    list&lt;Onderzoek&gt; Wielrenner::getOnderzoekenList(){
	return onderzoeken;
    }


Pointer to incomplete class type is not allowed

Is the proper HTML entity for giving dimensions `&amp;times;`? I want to be semantically correct, but that begs the question, is listing a dimension as `2&quot; x 3&quot;` even semantic? If the *x* represents &quot;by&quot;, would I use the letter x or &amp;times;?

In my code I&#39;ve been using `2&amp;Prime;&amp;nbsp;&amp;times;&amp;nbsp;3&amp;Prime;`, or 2&amp;Prime;&amp;nbsp;&amp;times;&amp;nbsp;3&amp;Prime;. The non-breaking spaces are to prevent the dimension from being wrapped, as per the suggestions found in [The Elements of Typographic Style Applied to the Web][1].


  [1]: http://webtypography.net/Rhythm_and_Proportion/Etiquette_of_Hyphenation_and_Pagination/2.4.6/

What is the proper HTML entity for the &quot;x&quot; in a dimension?

As part of a larger problem (adding a `,makeUniqueIDs` argument to `rbind.SpatialPolygonsDataFrame` for situations when the polygon IDs are identical), I&#39;m running into this weird message from rbind:

    &gt; do.call(&quot;rbind&quot;,xd.small)
    Error in match.names(clabs, names(xi)) : 
      names do not match previous names

 - [xd.small `dput` output](https://gist.github.com/3387091)

The only other info I could find on this was [this question](https://stackoverflow.com/questions/2504543/merge-multiple-data-frames-error-in-match-namesclabs-namesxi-names-do-n), which leads me to believe that `rbind` was at the root of the problem there also.

I can just write my own rbind-like function of course, but presumably this `match.names` check occurs for a reason, and I&#39;m curious what it is.

rbind error: &quot;names do not match previous names&quot;

As part of a larger problem (adding a <code>,makeUniqueIDs</code> argument to <code>rbind.SpatialPolygonsDataFrame</code> for situations when the polygon IDs are identical), I'm running into this weird message from rbind:
<pre><code class="hljs language-lua">> do.call("rbind",xd.small)
Error in match.names(clabs, names(xi)) : 
 names do not match previous names
</code></pre>
<ul>
<li><a href="https://gist.github.com/3387091" target="_blank" rel="noopener noreferrer">xd.small <code>dput</code> output</a></li>
</ul>
The only other info I could find on this was <a href="https://stackoverflow.com/questions/2504543/merge-multiple-data-frames-error-in-match-namesclabs-namesxi-names-do-n" target="_blank" rel="noopener noreferrer">this question</a>, which leads me to believe that <code>rbind</code> was at the root of the problem there also.
I can just write my own rbind-like function of course, but presumably this <code>match.names</code> check occurs for a reason, and I'm curious what it is.

I&#39;m writing a [geocoding function][1] right now that relies on having a Bing Maps Key.  Obviously I&#39;d rather not publish mine, and the examples fail without one.

How do I include an example for users to run manually, but not have it executed during `R CMD check`?


  [1]: https://github.com/gsk3/taRifx.geo/blob/master/R/Contributed.R

How to not run an example using roxygen2?

How can I increase the space between the bars in a bar plot in [ggplot2][1] ?


  [1]: http://had.co.nz/ggplot2/

How to increase the space between the bars in a bar plot in ggplot2?

I&#39;m currently working with igraph and have colour labelled my vertices. I would like to add a legend Indicating what each colour represents. 

What I can think of at this point is to use ggplot2 to print only the legend and hide a bar plot. 
Is there a way to just output the legend?

How to plot just the legends in ggplot2?

When using `data.table` is it possible to return all the columns except one, like in `data.frame`?

If the answer is no, does anyone have an elegant way to transform a multiple time series `data.table` to a `zoo` or other time series object?

Consider the following example:

    library(data.table)
    library(zoo)
    
    ## DEFINE DATA
    set.seed(1)
    dt = data.table(
        mydates = as.Date(&quot;2012-01-01&quot;) + 1:9, 
    	value1 = sort(rpois(9, 6)),
    	value2 = sort(rpois(9, 6)),
    	value3 = sort(rpois(9, 6)),
    	value4 = sort(rpois(9, 6)),
    	value5 = sort(rpois(9, 6)))
    
    ## CONVERT TO DATA FRAME
    df = as.data.frame(dt)
    
    ## CONVERT TO ZOO
    zooObj = zoo(df[,-1], df$mydates)

    ## EXAMPLE OF DESIRED RESULTS
    plot(zooObj, col=1:ncol(zooObj))

How would I do that without `df = as.data.frame(dt)`?


How to exclude one column from data.table OR convert to data.table to MTS

Sourcing files using a relative path is useful when dealing with large codebases. Other programming languages have well-defined mechanisms for sourcing files using a path relative to the directory of the file being sourced into. An example is Ruby&#39;s [`require_relative`](http://extensions.rubyforge.org/rdoc/classes/Kernel.html). What is a good way to implement relative path sourcing in R?

Below is what I pieced together a while back using various recipes and R forum posts. It&#39;s worked well for me for straight development but is not robust. For example, it breaks when the files are loaded via the `testthat` library, specifically `auto_test()`. `rscript_stack()` returns `character(0)`.

	# Returns the stack of RScript files
	rscript_stack &lt;- function() {
	  Filter(Negate(is.null), lapply(sys.frames(), function(x) x$ofile))
	}

	# Returns the current RScript file path
	rscript_current &lt;- function() {
	  stack &lt;- rscript_stack()
	  r &lt;- as.character(stack[length(stack)])
	  first_char &lt;- substring(r, 1, 1)
	  if (first_char != &#39;~&#39; &amp;&amp; first_char != .Platform$file.sep) {
	    r &lt;- file.path(getwd(), r)
	  }
	  r
	}

	# Sources relative to the current script
	source_relative &lt;- function(relative_path, ...) {
	  source(file.path(dirname(rscript_current()), relative_path), ...)
	}

Do you know of a better `source_relative` implementation?

Content Type	Original Author	Original Content on Stackoverflow
Question	Ari B. Friedman	View Question on Stackoverflow
Solution 1 - R	IRTFM	View Answer on Stackoverflow
Solution 2 - R	Dr Nick Engerer	View Answer on Stackoverflow
Solution 3 - R	J Recaido	View Answer on Stackoverflow
Solution 4 - R	user8412546	View Answer on Stackoverflow

rbind error: "names do not match previous names"

R Problem Overview

R Solutions

Solution 1 - R

Solution 2 - R

Solution 3 - R

Solution 4 - R

What is the proper HTML entity for the "x" in a dimension?

Pointer to incomplete class type is not allowed

Attributions