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توضیحات

Craterstats - a tool to analyse and plot crater count data for planetary surface dating

ویژگی	مقدار
سیستم عامل	-
نام فایل	craterstats-3.0.9
نام	craterstats
نسخه کتابخانه	3.0.9
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Greg Michael
ایمیل نویسنده	ggmichael@users.noreply.github.com
آدرس صفحه اصلی	https://github.com/ggmichael/craterstats
آدرس اینترنتی	https://pypi.org/project/craterstats/
مجوز	BSD license

# Craterstats This is a reimplementation in Python 3.8 of the CraterstatsII software, a tool to analyse and plot crater count data for planetary surface dating. # Installation There are various ways to install Python. If you are installing it specifically to run Craterstats, the following is suggested: 1. Install Python 3.8 or higher from [python.org](https://www.python.org/downloads/). 1. Open a command prompt/terminal window and enter these commands to establish a Python *virtual environment:* Windows: py -m venv c:\craterstats c:\craterstats\Scripts\activate py -m pip install craterstats Linux: python3 -m venv ~/.craterstats source ~/.craterstats/bin/activate python3 -m pip install craterstats After you see the required python packages installed, the set-up is complete. # Quick demonstration After installation, the following command will produce a series of example output plots and data, demonstrating the main features of the software. Plot image files are placed into the subfolder `demo/`, while text output – including the full command lines as they could be typed to generate the output – goes to the terminal window. craterstats -demo # Normal start Open a command prompt/terminal window and run the activate script: Windows: c:\craterstats\Scripts\activate Linux: source ~/.craterstats/bin/activate # Usage The program operates through the command line to produce output in the form of publication or presentation ready graphics, or tabulated analysis results for further processing. There are two parts to creating a Craterstats plot: 1. Specify the type of plot and any characteristics which apply to the analysis as a whole, e.g. whether differential, cumulative of other data presentation; the chronology system, displayed axis ranges 2. Specify the data to be overplotted, and which chronology model evaluations should be applied to it In the following example, the first items define characteristics for the whole plot: `-cs neukumivanov` specifies chronology system 4, *Mars, Neukum-Ivanov (2001)* , and the `-title Example plot` adds the chosen title. The `-p` indicates the start of an overplot definition, which should come after the part 1 settings. Following this, the path to the data source is given: this will produce a simple data plot with the default binning, colour and plot symbol. After the second `-p`, an additional overplot is specified: this time, a poisson age evaluation for the diameter range 0.2–0.7 km. Note that parameters within an overplot definition are separated by a `,`. craterstats -cs neukumivanov -title Example plot -p source=craterstats/sample/Pickering.scc -p type=poisson,range=[.2,.7] By default, an output file is created in the current folder with the name `out.png`. The output path or name can be set with the `-o` option. Different file types can be produced by giving the appropriate extension or with the `-f` option. Supported types are: png, jpg, tif, pdf, svg, txt. Tables of chronology systems, equilibrium functions and epoch systems – which can be used with the `-cs`, `-ef` and `-ep` options – may be listed with the following command: craterstats -lcs These items may specifed by their index number, e.g. `-cs 4`, or using any unambiguous abbreviated form, e.g. `-cs ida`. Similarly, `-ef standard` or `-ef trask` is equivalent to `-ef 1` Numbered tables of plot symbols and colours – which can be used with the `psym=` and `colour=` options – may be listed with the following command: craterstats -lpc and can likewise be specified by index or abbreviation, e.g. `psym=1`, `psym=circle` or `psym=o` all select a circle; `colour=2`, `colour=green` or `colour=gr` select green. Differential plots are produced by default. To switch to a different kind, e.g. cumulative, add `-pr 1` or `-pr cum` to the part 1 settings. Other possibilities are: 3 - relative (R), 4 - Hartmann, 5 - chronology, 6 - rate. The complete set of options can be seen with: craterstats --help # Additional information The useable chronology systems, equilibrium functions and epoch systems are defined in the text file `config/functions.txt`. User functions may be added here, following the same format. There is a text file `config/default.plt` which contains all the default plot settings. This may be modified to suit the choices you use most often. To simplify the construction of the command line, certain plot properties are 'sticky'. If, for example, you specify `source=craterstats/sample/Pickering.scc` in the first overplot, this becomes the default for subsequent overplots. Only if you wish to introduce a different source file do you need to specify it again. This applies to other properties where it is useful, including `binning=`, `colour=` and `psym=`. # References Explanations of concepts and calculations used in the software are given in publications below. #### Standardisation of crater count data presentation >Arvidson, R.E., Boyce, J., Chapman, C., Cintala, M., Fulchignoni, M., Moore, H., Neukum, G., Schultz, P., Soderblom, L., Strom, R., Woronow, A., Young, R. [Standard techniques for presentation and analysis of crater size–frequency data.](https://doi.org/10.1016/0019-1035%2879%2990009-5) Icarus 37, 1979. #### Formulation of a planetary surface chronology model >Neukum G., [Meteorite bombardment and dating of planetary surfaces](http://ntrs.nasa.gov/search.jsp?R=19840027189) (English translation, 1984). [Meteoritenbombardement und Datierung planetarer Oberflächen](http://www.planet.geo.fu-berlin.de/public/Neukum-Thesis%201983.pdf) (German original) Habilitation Thesis, Univ. of Munich, 186pp, 1983. #### Resurfacing correction for cumulative fits; production function differential forms >Michael G.G., Neukum G., [Planetary surface dating from crater size-frequency distribution measurements: Partial resurfacing events and statistical age uncertainty.](http://doi.org/10.1016/j.epsl.2009.12.041) Earth and Planetary Science Letters 294, 2010. #### Differential fitting; binning bias correction; revised Mars epoch boundaries >Michael G.G., [Planetary surface dating from crater size-frequency distribution measurements: Multiple resurfacing episodes and differential isochron fitting.](http://doi.org/10.1016/j.icarus.2013.07.004) Icarus 2013. #### Poisson timing analysis; μ-notation >Michael G.G., Kneissl T., Neesemann A., [Planetary surface dating from crater size-frequency distribution measurements: Poisson timing analysis.](https://doi.org/10.1016/j.icarus.2016.05.019) Icarus, 2016. #### Poisson calculation for buffered crater count >Michael G.G., Yue Z., Gou S., Di K., [Dating individual several-km lunar impact craters from the rim annulus in region of planned Chang’E-5 landing Poisson age-likelihood calculation.](https://doi.org/10.1016/j.epsl.2021.117031) EPSL 568, 2021. Full references for specific chronology or other functions are listed with the function definitions in `config/functions.txt`. A set of introductory slides from a previous workshop is available here: [https://pdsimage2.wr.usgs.gov/pub/pigpen/tutorials/FreieUni_Workshop2012/](https://pdsimage2.wr.usgs.gov/pub/pigpen/tutorials/FreieUni_Workshop2012/)

نیازمندی

مقدار	نام
-	colorama
-	cycler
-	kiwisolver
-	matplotlib
-	numpy
-	pandas
-	Pillow
-	pyparsing
-	python-dateutil
-	pytz
-	scipy
-	six

زبان مورد نیاز

مقدار	نام
>=3.8, <4	Python

نحوه نصب

نصب پکیج whl craterstats-3.0.9:

pip install craterstats-3.0.9.whl

نصب پکیج tar.gz craterstats-3.0.9:

pip install craterstats-3.0.9.tar.gz