WebNIR

Choose the data file and enter the required data

Percentage-based indices

Unit-based indexes

Unit of measurement for position (in data-file) mm cm dm m

Absolute error on position mm cm dm m

Absolute error on index

Relative error on index %

Graph with linear ordinate axis

Graph with logarithmic ordinate axis

Elaborate Reset

Data file format

• The data file passed to this application must be a standard ASCII text, therefore preferably without accented characters or special, Greek letters or other non-standard signs.
• The file must have a txt extension and a maximum size of 10 kB.
• It must consist of a succession of lines, which can be comment lines or data lines.
• Lines preceded by characters; # ! (semicolon, pound sign or exclamation point) are considered comments and are not taken into consideration for processing. I am comments in line with each pair of are also eligible measurement data.
• Each of the rows containing data must match to a single measurement point and consist of a pair of numeric values, separated by a comma, one or multiple spaces or a tab character.
• The first value of the pair indicates the distance from the source (or more precisely the position on the coordinate axis along which the measurements are performed), with units of measurement that can be specified in the user interface (default meters), but which must be the same for everyone the points. The second is the radiation protection index measured, expressed on a unit or percentage basis; the base, to be specified in the interface, it must be the same for all measured values; the default value is percentage-based indices. After the second value of the couple, a comment can possibly be inserted, preceded by one of the distinctive characters above.
• In numeric values, the decimal point is the period; decimal or exponential scientific notation is permitted.

Example

 # Comment 1
 ! Comment 2
 0.20,99.99
 0.40,17.06
 1.16,1.04
 1.20,1.00 ;Comment on a specific measure
 1.80,0.24

Other examples are available in the Presentation.

Constraints on incoming data

• The absolute distance error cannot be > 10 cm.
• The relative error on the index cannot be > 50%.
• The absolute error on the index cannot be > 10 if the index is calculated on a percentage basis, > 0.1 if calculated on a per unit basis.

Procedure

1. Switch to the Data Entry tab.
2. Press the Data File button and select the data file containing the measurements you want to process.
3. Select Percentage Based Indexes or Indexes on a unitary basis, as the case may be.
4. Select the unit of distance measurement, a depending on the case.
5. Optionally specify the error value provided by the application.
6. Select Graph with linear ordinate axis or Graph with logarithmic ordinate axis.
7. Press the Process button and wait for completion of processing.
8. Switch to the Results tab to view the textual and graphical results: some information relating to calculation time and the interpolation procedure, one summary table with the input file data (downloadable in PNG or XLS format) and a graph with the result of the interpolation and the value of the respect distance (also downloadable in PNG format).
9. Return to the Data Entry tab and press the Reset button if you want to reset the application to proceed with a new processing.

Data file for non-homogeneous errors

You can also use data files with a 3, 4 or 5 columns, in in order to support measurements with non-homogeneous errors:

1. file with 3 columns:
• the third column is interpreted as relative error on the index;
• the absolute error on the index and that on the distance, equal for all points, are obtained from the entry form data;
2. file with 4 columns:
• the third column is interpreted as relative error on the index;
• the fourth column is interpreted as absolute error on the index;
• the absolute error on the distance, equal for all points, is obtained from the data entry form;
3. file with 5 columns:
• the third column is interpreted as relative error on the index;
• the fourth column is interpreted as absolute error on the index;
• the fifth column is interpreted as an absolute error on distance.

Depending on the number of columns present in the file loaded, the fields to be ignored in the input form are enabled or they disable consistently with the number of columns specified, as yes you can see by clicking on the following images:

Since inserting errors via the yes disable part of the UI, it's no longer It is possible to specify the unit of measurement of the error on the distance, which is implied to be homogeneous with the unit measuring for the position.

Particular attention should also be paid to values inserted, as the validity check is missing on the range of input data for disabled fields.

The following are some examples file with data on 3, 4 and 5 columns:

• file with data in 3 columns
• file with data in 4 columns
• file with data in 5 columns

and the display of a graph obtained by imposing non-values homogeneous for the various errors (the errors associated with the measurements at the extremes have been deliberately accentuated):