Descriptive Statistics
- Updated2024-09-12
- 5 minute(s) read
DIAdem ANALYSIS > Statistics > Descriptive Statistics
Descriptive Statistics
Use this dialog box to calculate the statistical characteristic values.
Settings
| Channel-oriented/Row-oriented evaluation | Specifies whether DIAdem runs the calculation in channels or rows. Note If you calculate characteristic values line-oriented over several channels, you must enable the Store results in channels setting in order to save the results. Only if you use a channel oriented calculation does DIAdem save the result in the custom properties of the input channels. | |
| Channels | Specifies which data channels to evaluate. | |
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Select Channels | Opens the channel selection list. |
| Calculate over all rows | Specifies whether the evaluation occurs over all rows of the selected channels. In row-oriented statistics, DIAdem does not evaluate rows that exceed the shortest channel length of the selected channels. In channel-oriented statistics, DIAdem evaluates the complete channel length of an input channel. | |
| From row | Specifies the start row of the channels to be evaluated. | |
| To row | Specifies the end row of the channels to be evaluated. |
Characteristic Values 1
| Measured values | Specifies whether DIAdem calculates the sum of the measured values. | |
| Squared measured values | Specifies whether DIAdem calculates the sum of the squared measured values. | |
| Arithmetic mean | Specifies whether DIAdem calculates the arithmetic mean. | |
| Root mean square | Specifies whether DIAdem calculates the root mean square. | |
| Geometric mean | Specifies whether DIAdem calculates the geometric mean. | |
| Harmonic mean | Specifies whether DIAdem calculates the harmonic mean. | |
| Anderson-Darling test | Specifies whether DIAdem executes the Anderson-Darling test. DIAdem calculates the p-value (significance value), based on the Anderson-Darling test for normal distribution. If the p-value is greater than 0.05, it is a normal distribution and DIAdem sets the property Result ~ Statistics ~ NormalDistribution ~ AndersonDarling ~ IsNormalDistributed to True. | |
| Minimum value | Specifies whether DIAdem calculates the minimum value. | |
| Maximum value | Specifies whether DIAdem calculates the maximum value. | |
| Average absolute deviation from mean | Specifies whether DIAdem calculates the average absolute deviation from the mean. | |
| Average absolute deviation from median | Specifies whether DIAdem calculates the average absolute deviation from the median. | |
| All On | Selects all characteristic values. | |
| All Off | Deselects all characteristic values. |
Characteristic Values 2
| Samples / Population | Specifies whether DIAdem calculates the characteristic values based on the population or on the sample. DIAdem can calculate the characteristic values of standard deviation, variance, variation coefficient, relative variation coefficient, standard error, skewness, kurtosis, and of excess, for samples and population. | |
| 0.025 quantile | Specifies whether DIAdem calculates the 0.25 quantile. | |
| 0.25 quantile (lower quartile) | Specifies whether DIAdem calculates the 0.25 quantile (lower quartile). | |
| 0.50 quantile (median) | Specifies whether DIAdem calculates the 0.50 quantile (median). | |
| 0.75 quantile (upper quartile) | Specifies whether DIAdem calculates the 0.75 quantile (upper quartile). | |
| 0.975 quantile | Specifies whether DIAdem calculates the 0.975 quantile. | |
| Skewness | Specifies whether DIAdem calculates the skewness. | |
| Kurtosis | Specifies whether DIAdem calculates the kurtosis. | |
| Excess | Specifies whether DIAdem calculates the excess. | |
| Range | Specifies whether DIAdem calculates the range. | |
| Quartile distance | Specifies whether DIAdem calculates the quartile distance. | |
| Standard deviation | Specifies whether DIAdem calculates the standard deviation. | |
| Standard error | Specifies whether DIAdem calculates the standard error. | |
| Variance | Specifies whether DIAdem calculates the variance. | |
| Variation coefficient | Specifies whether DIAdem calculates the variation coefficient. | |
| Relative variation coefficient | Specifies whether DIAdem calculates the relative variation coefficient. | |
| Three sigma | Specifies whether DIAdem calculates the triple standard deviation. | |
| Six sigma | Specifies whether DIAdem calculates the sixfold standard deviation. | |
| All On | Selects all characteristic values. | |
| All Off | Deselects all characteristic values. |
Result Storage
| Store results in channels | Specifies whether DIAdem also stores the result values in data channels. Use this storage method for line-oriented calculations. |
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| Also store channel name | Specifies whether DIAdem stores the names of the input channel in a text channel. | |
| Name syntax | Specifies how DIAdem stores the names of the input channel in the text channel. |
Result
DIAdem displays the results in the workspace of DIAdem ANALYSIS. If you use a channel-oriented calculation for the characteristic values, DIAdem saves the results as custom properties in the input channels. If you enable the storage in data channels, DIAdem creates a result channel for each characteristic value. The result channels have as many values as the input channels you selected for a channel-oriented calculation and as lines you selected in line-oriented calculations.
If you execute the evaluation over all rows of the selected channels, DIAdem saves the results in the following custom properties of the input channel: Result~Statistics~AverageAbsDeviation~FromMean, Result~Statistics~AverageAbsDeviation~FromMedian, Result~Statistics~Dispersion~QuartileDistance, Result~Statistics~Dispersion~Range, Result~Statistics~Dispersion~RelativeVariationCoefficient, Result~Statistics~Dispersion~StandardDeviation, Result~Statistics~Dispersion~StandardError, Result~Statistics~Dispersion~Variance, Result~Statistics~Dispersion~VariationCoefficient, Result~Statistics~ExtremeValues~Maximum, Result~Statistics~ExtremeValues~Minimum, Result~Statistics~Form~ExcessKurtosis, Result~Statistics~Form~Kurtosis, Result~Statistics~Form~Skewness, Result~Statistics~MeanValues~ArithmeticMean, Result~Statistics~MeanValues~GeometricMean, Result~Statistics~MeanValues~HarmonicMean, Result~Statistics~MeanValues~SquareMean, Result~Statistics~Quantiles~LowerQuartile, Result~Statistics~Quantiles~Median, Result~Statistics~Quantiles~UpperQuartile, Result~Statistics~Sums~Sum, Result~Statistics~Sums~SumOfSquares, Result~Statistics~Dispersion~ThreeSigma, and Result~Statistics~Dispersion~SixSigma. For the Anderson-Darling test, DIAdem saves the results also in the following custom properties of the input channel: Result~Statistics~NormalDistribution~AndersonDarling~IsNormalDistributed and Result~Statistics~NormalDistribution~AndersonDarling~p.
If you execute evaluation only on specific lines of the selected channels, DIAdem does not store the results in custom properties because the assignment to the input channel is not unique.
In addition, DIAdem stores the names and values of the custom properties in the StatsPropertyName and StatsResult variables after the channel-oriented calculation.
 | Note Use the StatsSelection variable to specify which characteristic statistics values DIAdem calculates in a script. |
 | Refer to the Help page Statistical Characteristic Values for mathematical details. |
 | To calculate quantity-based in DIAdem, click the Calculate Quantity-Based button on the DIAdem ANALYSIS toolbar. When executing quantity-based calculations, DIAdem checks whether the program can also execute calculations on physical quantities in the same calculation. If DIAdem cannot execute the calculation because the physical quantities are unsuitable, the program displays an error message. Refer to the Help page Calculating Quantity-Based and Non-Quantity-Based in DIAdem for the conditions and rules for quantity-based calculations. |
Script Call
Call SUDDlgShow("Main", ResourceDrv & "AnaChnStatisticsChannel_BlockCalc")
ChnStatisticsChannelCalc
ChnStatisticsBlockCalc
Procedures
Determining the Characteristic Statistical Values of a Channel