How to make ptr during the gagerr process??

I want to know the ptr value by gagarr but I cannot understand the syntax about the PTR.

'Help' says that we can know that by adding parameter 'spec' which is the two element vector. In this point I can't understand the syntax.

Somebody could help me or give some examples how to get PTR please.

Answer 1

[Uday Pradhan]

Hi,

Referring to the documentation page of gagerr, I can give you an example as follows:

%to display the ptr value, we need to provide a name value pair for spec, something like:
gagerr(y,{part, operator},'randomoperator',true,'spec',[1 2])

Following 'spec' you must give the lower and upper limit of the process as a two - element vector just like I have provided above as [ 1 2 ]. For the example given on the documentation page, I get output as:

  Columns 1 through 5
    {'Source'           }    {'Variance'           }    {'% Variance'       }    {'sigma'             }    {'5.15*sigma'       }
    {'Gage R&R'         }    {[  0.971542729463783]}    {[ 99.2652690112843]}    {[ 0.985668671239876]}    {[ 5.07619365688536]}
    {'  Repeatability'  }    {[  0.953483068176294]}    {[ 97.4200623295928]}    {[ 0.976464575996638]}    {[ 5.02879256638268]}
    {'  Reproducibility'}    {[ 0.0180596612874893]}    {[ 1.84520668169142]}    {[ 0.134386239204352]}    {[0.692089131902412]}
    {'   Operator'      }    {[ 0.0180596612874893]}    {[ 1.84520668169142]}    {[ 0.134386239204352]}    {[0.692089131902412]}
    {'Part'             }    {[0.00719106045153992]}    {[0.734730988715743]}    {[0.0848001205868242]}    {[0.436720621022144]}
    {'Total'            }    {[  0.978733789915323]}    {[              100]}    {[ 0.989309754280894]}    {[  5.0949452345466]}
  Column 6
    {'% 5.15*sigma'    }
    {[99.6319572282329]}
    {[98.7016019776745]}
    {[13.5838384917203]}
    {[13.5838384917203]}
    {[ 8.5716450504891]}
    {0×0 char          }
Number of distinct categories (NDC):0
% of Gage R&R of total variations (PRR): 99.63
Precision-to-tolerance Ratio (PTR):  5.08
Note: The last column of the above table does not have to sum to 100%

I hope this clears your confusion regarding the syntax.