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normspec

Normal density plot shading between specifications

Sintaxis

p = normspec(specs)
p = normspec(specs,mu,sigma)
p = normspec(specs,mu,sigma,region)
[p,h] = normspec(___)

Descripción

ejemplo

p = normspec(specs) plots the standard normal density, shading the portion inside the specification limits given by the two-element vector specs, and returns the probability p of the shaded area. If spec has no lower limit, then set specs(1) to –Inf; if spec has no upper limit, then set specs(2) to Inf.

p = normspec(specs,mu,sigma) uses a normal density with parameters mu and sigma.

ejemplo

p = normspec(specs,mu,sigma,region) specifies the shading region as either 'inside' or 'outside' the specification limits. The default is 'inside'.

[p,h] = normspec(___) also returns a column vector of chart line objects using any of the input arguments in the previous syntaxes. Use h to modify properties of a specific chart line after you create it. For a list of properties, see Line Properties.

Ejemplos

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Create a standard normal density plot, shading the portion inside the specification limits [-1,1].

p = normspec([-1,1])

p = 0.6827

Create a normal density plot, shading the portion outside the specification limits.

For example, consider a production process that fills cans of paint. The average amount of paint in any can is 1 gallon, but variability in the process produces a standard deviation of 2 ounces (2/128 gallons). Create a normal density plot, shading the portion corresponding to the probability that the cans will be filled under specification by 3 or more ounces.

p = normspec([1-3/128,Inf],1,2/128,'outside')

p = 0.0668

Argumentos de entrada

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Specification limits, specified as a two-element numeric vector. Set specs(1) to –Inf if there is no lower limit; set specs(2) to Inf if there is no upper limit.

Tipos de datos: single | double

Mean of the normal distribution, specified as a scalar value.

Tipos de datos: single | double

Standard deviation of the normal distribution, specified as a positive scalar value.

Tipos de datos: single | double

Shading region, specified as either 'inside' or 'outside'. The function normspec shades the region either 'inside' or 'outside' the specification limits.

Output Arguments

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Probability of the shaded area, returned as a nonnegative scalar value.

One or more chart line objects, returned as a scalar or vector. These objects are unique identifiers that you use to query and modify properties of a specific chart line. For a list of properties, see Line Properties.

Consulte también

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Introducido antes de R2006a