[Insight-users] Retrieving values from an histogram...

Wed, 11 Feb 2004 16:08:11 -0500

This is a multi-part message in MIME format.

------=_NextPart_000_0026_01C3F0B9.3F0F9E30
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

Hello,

I am having a hard time figuring out how to retrieve values from an
histogram that I generate using the itk::ListSampleToHistogramGenerator.The
measurement vector from a bin, which I obtain using the
GetMeasurementVector() function, always contains a single element. My
understanding is that a bin with a frequency of 10 should have a measurement
vector that contains 10 values. Is that correct ???
If that is correct, here is the code I am using to view the content of the
generated histogram:

--------------------------------------
unsigned int size = this->m_Histogram->Size();

for( unsigned int x=0; x<size; x++ )
  {
  std::cout<<"Bin: "<<x<<std::endl;
  std::cout<<"Bin Frequency:
"<<this->m_Histogram->GetFrequency(x,0)<<std::endl;
  std::cout<<"Measurement:
"<<this->m_Histogram->GetMeasurementVector(x)<<std::endl;
  }
--------------------------------------

Am I missing anything ??? Is there any example that illustrates how to
retrieve values from an histogram. I could not find a specific paragraph
about this topic in the ITK software guide.

Thanks,

Jean-Philippe

------=_NextPart_000_0026_01C3F0B9.3F0F9E30
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2800.1276" name=3DGENERATOR></HEAD>
<BODY>
<DIV><SPAN class=3D644264720-11022004><FONT face=3DArial color=3D#0000ff =

size=3D2>Hello,</FONT></SPAN></DIV>
<DIV><SPAN class=3D644264720-11022004><FONT face=3DArial color=3D#0000ff =

size=3D2>&nbsp;</DIV>
<DIV>I am=20
having a hard time figuring out how to retrieve values from an histogram =
that I=20
generate using the =
itk::ListSampleToHistogramGenerator.<SPAN=20
class=3D644264720-11022004>The measurement=20
vector from a bin,&nbsp;which I obtain&nbsp;using the =
GetMeasurementVector()=20
function, always contains&nbsp;a single&nbsp;element. My understanding =
is that a=20
bin with a frequency of 10 should have a measurement vector that =
contains 10=20
values. Is that correct ???</DIV>
<DIV>If=20
that is correct, here is the code I am using to view the content =
of the=20
generated histogram:</DIV>
<DIV><FONT=20
size=3D2> -------------------------------------- unsigned int size =3D =
this<FONT=20
face=3DArial color=3D#0000ff=20
size=3D2>-&gt;m_Histogram-&gt;Size(); for</FO=
NT><FONT=20
size=3D2>( unsigned =
<FONT=20
size=3D2>int x=3D0; =
x&lt;size<FONT=20
face=3DArial color=3D#0000ff size=3D2>; x++ ) <FONT=20
color=3D#0000ff>&nbsp;=20
{ <FONT=20
size=3D2>&nbsp; =
std::cout&lt;&lt;"Bin:=20
"&lt;&lt;x&lt;&lt;std::endl; &nbsp;=20
std::cout&lt;&lt;"Bin Frequency: =
"&lt;&lt;this<FONT=20
face=3DArial color=3D#0000ff=20
size=3D2>-&gt;m_Histogram-&gt;GetFrequency(x,0)&lt;&lt;std::endl; <SPA=
N=20
class=3D644264720-11022004>&nbsp; std::cout&lt;&lt;"Measurement:=20
"&lt;&lt;this<FONT=20
face=3DArial>-&gt;m_Histogram-&gt;GetMeasurementVector(x)&lt;&lt;std::end=
l; <FONT=20
face=3DArial>&nbsp;=20
} -------------------------------------- </SP=
AN><SPAN=20
class=3D644264720-11022004>Am I missing=20
anything ???&nbsp;Is there any example that illustrates how to retrieve =
values=20
from an histogram. I could not find a specific paragraph about this =
topic in the=20
ITK software guide. </DIV>
<DIV><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D644264720-11022004><FONT face=3DArial color=3D#0000ff =

size=3D2>Thanks,</FONT></SPAN></DIV>
<DIV><SPAN class=3D644264720-11022004><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D644264720-11022004><FONT face=3DArial color=3D#0000ff =

size=3D2>Jean-Philippe</FONT></SPAN><SPAN=20
class=3D644264720-11022004></DIV></SPAN></BODY></HTML>

------=_NextPart_000_0026_01C3F0B9.3F0F9E30--