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Monte Carlo Analysis<br />

Output of Uncertainty Analysis (the .chi File)<br />

A similar expression can be obtained for the probability<br />

“Less or Equal” with the operator “Greater or Equal.”<br />

See section “Probability and Quantile Estimators” on page 480.<br />

• MCBOUND(LABEL_EXT, PROB_VALUE)<br />

by replacing the operator<br />

Returns the quantile probability associated to a given probability π. This is the<br />

inverse problem solved in the MCPROB(.) function. The argument PROB_VALUE is<br />

the value π. Formally this function is computed with the following optimization<br />

problem. For 0 < π < 1, the quantity:<br />

is called the π-quantile of Y. The standard estimator of the π-quantile is<br />

where<br />

is the integer ceiling function and Y (k) is the k-th order statistics with<br />

.<br />

See section “Probability and Quantile Estimators” on page 480.<br />

• MCMED(LABEL_EXT)<br />

Returns the median value of the output sample of a given response Y. The median value<br />

is the 0.5-quantile of the distribution (see the section Robust Measures of Location for<br />

more information).<br />

• MCQ1(LABEL_EXT) and MCQ3(LABEL_EXT)<br />

Returns the first quartile and the third quartile of the distribution of a given response Y.<br />

We have the 0.25 quantile and the 0.75 quantile (see<br />

the section Alternative Measures of Dispersion for more information).<br />

Extracting the Index and Total Number of Runs<br />

Use the ICARLO and NBCARLO keywords to extract the index of the current run and the total<br />

number of runs:<br />

• ICARLO<br />

Extracts the index of the current Monte Carlo run (first index is 0). See the ICARLO<br />

Usage Example.<br />

• NBCARLO<br />

468<br />

Eldo® User's Manual, 15.3

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