Hi there, my question is as follows; How to make symbols of "sigma", that is, "normal pressure" value, etc. in matlap and engineering? Also, which additional extension should

how can I make sigma code? "σ"

[Jan]

Where? In the command window? In a text file? In the legend or title of a plot?

[YASIN TAHA AYAZ]

Inside the editor, to define a variable.

Answer 1

[Walter Roberson]

MATLAB variable names:

• start with an upper case or lower case English alphabet character -- ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
• After that the characters may include upper case or lower case English alphabet character, or the arabic numerals 0123456789 or the underscore character
• must be at most 63 characters long

It is not possible in MATLAB to use σ as part of the name of a MATLAB variable.

That said:

If you are using Livescript and you have a Symbolic Toolbox variable name that is one of the English names of the Greek alphabet, with an upper or lower case initial letter, or in some cases with "var" proceeding the name of the Greek character, then when you display a symbolic expression that has the variable in output, then Livescript will render the character as a graphic

syms alpha beta gamma delta epsilon zeta eta theta iota kappa lambda mu nu xi omicron pi rho sigma tau upsilon phi chi psi omega
syms Alpha Beta Gamma Delta Epsilon Zeta Eta Theta Iota Kappa Lambda Mu Nu Xi Omicron Pi Rho Sigma Tau Upsilon Phi Chi Psi Omega
syms varalpha varbeta vargamma vardelta varepsilon varzeta vareta vartheta variota varkappa varlambda varmu varnu varxi varomicron varpi varrho varsigma vartau varupsilon varphi varchi varpsi varomega

syms Varalpha Varbeta Vargamma Vardelta Varepsilon Varzeta Vareta Vartheta Variota Varkappa Varlambda Varmu Varnu Varxi Varomicron Varpi Varrho Varsigma Vartau Varupsilon Varphi Varchi Varpsi Varomega
syms varAlpha varBeta varGamma varDelta varEpsilon varZeta varEta varTheta varIota varKappa varLambda varMu varNu varXi varOmicron varPi varRho varSigma varTau varUpsilon varPhi varChi varPsi varOmega

[alpha beta gamma delta epsilon zeta eta theta iota kappa lambda mu nu xi omicron pi rho sigma tau upsilon phi chi psi omega]

ans = 

[Alpha Beta Gamma Delta Epsilon Zeta Eta Theta Iota Kappa Lambda Mu Nu Xi Omicron Pi Rho Sigma Tau Upsilon Phi Chi Psi Omega]

ans = 

Then a few of the lower case forms have variants

[varalpha varbeta vargamma vardelta varepsilon varzeta vareta vartheta variota varkappa varlambda varmu varnu varxi varomicron varpi varrho varsigma vartau varupsilon varphi varchi varpsi varomega]

ans = 

But none of the upper case forms

[Varalpha Varbeta Vargamma Vardelta Varepsilon Varzeta Vareta Vartheta Variota Varkappa Varlambda Varmu Varnu Varxi Varomicron Varpi Varrho Varsigma Vartau Varupsilon Varphi Varchi Varpsi Varomega]

ans = 

[varAlpha varBeta varGamma varDelta varEpsilon varZeta varEta varTheta varIota varKappa varLambda varMu varNu varXi varOmicron varPi varRho varSigma varTau varUpsilon varPhi varChi varPsi varOmega]

ans = 

This is all only output representation, not the variable names themselves.