I want to use METAS UncLib from MATLAB, how it does work?

[Michael Wollensack METAS]

I want to use METAS UncLib from MATLAB, how it does work?

[Michael Wollensack METAS]

Minimum software requirements:

- MATLAB R2010b

- Metas.UncLib V1.4.2

- Metas.UncLib.Matlab V1.4.4

MATLAB:

>> a = LinProp(3, 0.3)

Loading .NET Assembly: C:\Program Files (x86)\Metas\Metas.UncLib\Metas.UncLib.Core.dll

Loading .NET Assembly: C:\Program Files (x86)\Metas\Metas.UncLib\Metas.UncLib.LinProp.dll

Loading .NET Assembly: C:\Program Files (x86)\Metas\Metas.UncLib\Metas.UncLib.Optimization.dll

 

a = 

 

   (3 ± 0.3)

 

>> b = LinProp(4, 0.4)

 

b = 

 

   (4 ± 0.4)

 

>> c = sqrt(a.*a + b.*b)

 

c = 

 

   (5 ± 0.367151)

 

>> 

[Michael Wollensack METAS]

I released a single installer for METAS UncLib V1.4.8.

Minimum software requirements:

- MATLAB R2010b

- METAS UncLib V1.4.8, see www.metas.ch/unclib

[Jan Grajciar CMI]

Hi Michael,

is it possible to enter a name (description) in MATLAB when defining a variable? So that I can see the origin of the uncertainty in the overview (unc_budget).

Thanks

Jan

[Jan Grajciar CMI]

for example, for complex variables. I tried to modify the notation for non-complex numbers a = LinProp(3,4,'name'), but I did not find the appropriate notation

While setting the 'Value' property of 'GuiUncBudget':

Value must be 'Metas.UncLib.LinProp.UncNumber'.

 and I did not find it in the documentation https://www.metas.ch/dam/data/metas/Fachbereiche/Hochfrequenz/UncLib/Metas.UncLib.Matlab.UserReference%20V1.8.pdf

[Michael Wollensack METAS]

Hi,

You can do it like that:

>> a = LinProp(3, 0.3, 'a');

>> b = LinProp(4, 0.4, 'b');

>> c = sqrt(a.*a + b.*b);

>> d = a + 1i.*b;

>> e = abs(d);

>> unc_budget(c)

>> unc_budget(e)

Hope this helps!

Regards

Michael

[Jan Grajciar CMI]

Hi,

and how would it look like for a matrix of complex numbers?

 LinProp([complex value], [covariance],(description))

Thanks

Jan

[Michael Wollensack METAS]

Hi,

yes with METAS UncLib V1.8.2 or newer:

- ComplexUncNumber, RealUncArray and ComplexUncArry with description added, unc(value, [covariance], description).

See the following example:

>> a = LinProp([3 4], [0.09 0; 0 0.16], 'Triangle')

 

a.value = 

 

     3     4

a.standard_unc = 

 

    0.3000    0.4000

>> unc_budget(abs(a(1) + 1i.*a(2)))

 

Hope this helps.

Regards

Michael

[Jan Grajciar CMI]

Hi,

thank you very much, it helped. I used the older version of Metas UncLib, that did not allow it. I have one more question. Is it also possible to name the individual 'Triangle' components in the definition a = LinProp([3 4], [0.09 0; 0 0.16], 'Triangle'....?

Thanks

Jan

[Michael Wollensack METAS]

Hi,

> Is it also possible to name the individual 'Triangle' components in the definition a = LinProp([3 4], [0.09 0; 0 0.16], 'Triangle'....?

No. If you define the input quantities with a covariance it's not possible. The reason is that you could have correlation. Lets assume you would have full correlation then your covariance matrix would look like that:

[0.09 0.12; 0.12 0.16]

Then you would have only one contribution instead of two.

If you've no correlation then you could to it like that:

a1 = LinProp(3, 0.3, 'Triangle\ta1')

a2 = LinProp(4, 0.4, 'Triangle\ta2')