control chart

I have to plot a data for control chart ,i have data in range starting from 7 to 0.01,can u tell how to plot it please

[Jan]

These are too few details to give a meaningful answer.

[Pat]

i have data starting from 7,7,5,7,6.5.6,...............1.0.5.0.1

fom these data i have draw control char,is it possible or else do u need another set of data

assume y=7,7,5,7,6.5.6,...............1.0.5.0.1

is it possible to draw a control chart from y or do u need values of x also..

if u need values of x..please tahe random values for x

Answer 1

[bym]

you do not need x values.

st = controlchart(y,'chart',{'xbar' 'r'});

[Pat]

when i execute i get this error

Error using ==> controlchart>getctypeinfo at 433

XBAR, S, and R charts required grouped data.

wat is xbar

[bym]

try controlchart(y,'chart','i')

[Pat]

thank u proecsm

[Mayukh Chakraborty]

Thank you bym !!

controlchart(y,'chart','i')

This worked for my problem too.