[ROOT] gStyle->SetErrorX(dx)

Hi,

the documentation http://root.cern.ch/root/html/TGraphPainter.html says:

"gStyle->SetErrorX(dx) controls the size of the error along x. dx = 0 
removes the error along x."

Does this method to get rid of the x-error bars work?

cu,
Alexander

Re: [ROOT] gStyle->SetErrorX(dx)

Re: [ROOT] gStyle->SetErrorX(dx)

Hi Dmitry,

thanks for your reply.

I know about the "zero-array method", but I'm wondering whether the much 
easier method as described in the documentation works, because for me it 
apparently doesn't, but maybe that's my fault?

cu,
Alexander

Am 01.06.2010 21:59, schrieb Dmitry Kotov:
> Dear Alexander,
>
> If I understood you correctly, you need to get rid of error bars along
> x-axis in TGraphErrors.
> You should fill an zero-array with the number of elements equal to
> number of your data points.
> And then just put this array into your TGraphErrors stuff.
> In that case you don't need to use SetErrorX method at all.
>
> Cheers,
> Dmitry
>
> On Tue, Jun 1, 2010 at 1:38 PM, Alexander Mann <amann <at> uni-goettingen.de
> <mailto:amann <at> uni-goettingen.de>> wrote:
>
>     Hi,
>
>     the documentation http://root.cern.ch/root/html/TGraphPainter.html says:
>
>     "gStyle->SetErrorX(dx) controls the size of the error along x. dx =
>     0 removes the error along x."
>
>     Does this method to get rid of the x-error bars work?
>
>     cu,
>     Alexander
>
>
>
>

Re: [ROOT] gStyle->SetErrorX(dx)

Re: [ROOT] gStyle->SetErrorX(dx)

Re: [ROOT] Compiling ROOT 5.27 in ubuntu 10.04

Re: [ROOT] gStyle->SetErrorX(dx)

On 1 June 2010 13:33, Dmitry Kotov <dmitriy.kotov <at> gmail.com> wrote:
> btw, in fact you don't even need the zero-array thing.
> just put a "0" to the TGraphErrors in the place where you want to have
> 0-bars.
> but still that doesnt answer your question))
> sorry))
>
> On Tue, Jun 1, 2010 at 4:28 PM, Dmitry Kotov <dmitriy.kotov <at> gmail.com>
> wrote:
>>
>> well, i never used SetErrorX myself
>> you should wait for the expert's opinion))
>>

I am not an expert, but I have successfully used this before.
Something like this,

TStyle *myStyle = new TStyle("StyleName","my style");
...
myStyle->SetErrorX(0.00);
...
gROOT->SetStyle("StyleName");

This got rid of the X error bars for TProfiles for me.

>> Cheers,
>> Dmitry
>>

GL
--

-- 
Suvayu

Open source is the future. It sets us free.

Re: [ROOT] gStyle->SetErrorX(dx)

Hi,

OK, did you try calling gStyle->SetErrorX(0.0) directly, too?

cu,
Alexander

Am 01.06.2010 23:07, schrieb suvayu ali:
> On 1 June 2010 13:33, Dmitry Kotov<dmitriy.kotov <at> gmail.com>  wrote:
>> btw, in fact you don't even need the zero-array thing.
>> just put a "0" to the TGraphErrors in the place where you want to have
>> 0-bars.
>> but still that doesnt answer your question))
>> sorry))
>>
>> On Tue, Jun 1, 2010 at 4:28 PM, Dmitry Kotov<dmitriy.kotov <at> gmail.com>
>> wrote:
>>>
>>> well, i never used SetErrorX myself
>>> you should wait for the expert's opinion))
>>>
>
> I am not an expert, but I have successfully used this before.
> Something like this,
>
> TStyle *myStyle = new TStyle("StyleName","my style");
> ...
> myStyle->SetErrorX(0.00);
> ...
> gROOT->SetStyle("StyleName");
>
> This got rid of the X error bars for TProfiles for me.
>
>>> Cheers,
>>> Dmitry
>>>
>
> GL

Re: [ROOT] gStyle->SetErrorX(dx)

Hi Alexander,

On 1 June 2010 14:10, Alexander Mann <amann <at> uni-goettingen.de> wrote:
>
> Hi,
>
> OK, did you try calling gStyle->SetErrorX(0.0) directly, too?
>

I just tried, it works as before. Hope this helps somehow.

> cu,
> Alexander
>
>
> Am 01.06.2010 23:07, schrieb suvayu ali:
>>
>> On 1 June 2010 13:33, Dmitry Kotov<dmitriy.kotov <at> gmail.com>  wrote:
>>>
>>> btw, in fact you don't even need the zero-array thing.
>>> just put a "0" to the TGraphErrors in the place where you want to have
>>> 0-bars.
>>> but still that doesnt answer your question))
>>> sorry))
>>>
>>> On Tue, Jun 1, 2010 at 4:28 PM, Dmitry Kotov<dmitriy.kotov <at> gmail.com>
>>> wrote:
>>>>
>>>> well, i never used SetErrorX myself
>>>> you should wait for the expert's opinion))
>>>>
>>
>> I am not an expert, but I have successfully used this before.
>> Something like this,
>>
>> TStyle *myStyle = new TStyle("StyleName","my style");
>> ...
>> myStyle->SetErrorX(0.00);
>> ...
>> gROOT->SetStyle("StyleName");
>>
>> This got rid of the X error bars for TProfiles for me.
>>
>>>> Cheers,
>>>> Dmitry
>>>>
>>
>> GL
>
>

--

-- 
Suvayu

Open source is the future. It sets us free.

[ROOT] ErfcInverse

Hello,

A very basic comment: I think that in the documentation of the 
TMath::ErfcInverse function, the sentence "x must be  <-1<x<1" should be 
replaced by "x must be  <0<x<2".

I see this typo in 
http://root.cern.ch/root/html/TMath.html#TMath:ErfcInverse and 
http://root.cern.ch/root/html/src/TMath.cxx.html#m5Z1cC

Cheers,

Nicolas