Experimental Data Acquisition and Visualization

Transcription

1 Experimental Data Acquisition and Visualization Jaroslav Kysela Martin Šácha Michal Wittner Summer Academic Course Nové Hrady 2010 THIS PROJECT HAS RECEIVED FINANCIAL SUPPORT FROM THE EUROPEAN SOCIAL FUND AND FROM GOVERNMENT OF THE CZECH REPUBLIC

2 Aims of the project part 1 To master methods of experimental data processing using statistical software (R programming language) To understand basic statistical operations on multidimensional data samples To visualize multidimensional data by creating perspective, contour and level plots

3 Visualization Any technique of creating diagrams, images or animations to communicate a message Visual representation of information, data Very important part of contemporary science, medicine, education, engineering, etc.

4 Weather statistics ČHMÚ Czech Hydrometeorological Institute Long-Term Climatological Normals for the Period Mean Air Temperature Total Precipitation Sunshine Duration

5 Raw Data

6 Processed Data

7 Processed Data

8 R language workspace

9 Perspective Plot

10 Contour Plot

11 Level Plot

12 Level Plot

13 References R Development Core Team (2010). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria, URL Czech Hydrometeorological Institute (2010). Long-Term Climatological Normals for the Period , URL Wikipedia contributors (2010). Experimental data. Wikipedia, The Free Encyclopedia, URL

14 Aims of the project - part 2 algorithm design for web plotting and web-based user interface for interactive experiments

15 Algorithm #1 - basic lineplot PHP - language for web's dynamics MySQL - database storage server

16 Algorithm #2 howto connect to database Relationship between PHP and MySQL server via TCP socket $link = mysql_connect('localhost', user', 'password'); if (!$link) { die('could not connect: '. mysql_error()); } $db_selected = mysql_select_db("lak2010", $link); if (!$db_selected) { die ('Can\'t use foo : '. mysql_error()); } return ($link)

17 Algorithm #3 SQL query process $soucty_veku_qe="select count(id) as cid, vek, sum(zelvy)+ sum(zaci)+ sum(mraky)+sum(mysi)+sum(ovce)+sum(alice)+sum(psi)+ sum(premier)+sum(jezevec)+sum(mleko)+sum(clanek)+ sum(slovo1)+sum(mesto)+sum(slovo2)+sum(cislo)+ sum(pismeno) as soucet from bara1 group by vek order by vek"; $soucty_veku_re=mysql_query($soucty_veku_qe); $soucty_veku_result2=mysql_query($soucty_veku_qe); $soucty_veku_result3=mysql_query($soucty_veku_qe); $soucty_veku_pocet=mysql_num_rows($soucty_veku_re); $row3=mysql_fetch_array($soucty_veku_result3);

18 Algorithm #4 plotting loop $row3=mysql_fetch_array($soucty_veku_result3); $oldx_cid=$okraj+($sirka_grafu/$soucty_veku_pocet)/2; $oldy_cid=(($row3["soucet"]/$row3["cid"])*100)/$max_soucet; imagettftext($obrazek,7,0,$oldx_cid,$pocatek_v- $oldy_cid+10,$fialova,$pismo,$row3["soucet"]/$row3["cid"]); for($j=1;$j<$soucty_veku_pocet;$j++) { $row3=mysql_fetch_array($soucty_veku_result3); $newy_cid=(($row3["soucet"]/$row3["cid"])*100)/ $max_soucet; $newx_cid=$okraj+($sirka_grafu/$soucty_veku_po)/ 2+($j*($sirka_grafu/$soucty_veku_pocet)); imageline($obrazek,$oldx_cid,$pocatek_v-$oldy_cid, $newx_cid,$pocatek_v-$newy_cid,$fialova); imagettftext($obrazek,7,0,$newx_cid,$pocatek_v- $newy_cid+10,$fialova,$pismo, round($row3["soucet"]/$row3["cid"],2)); $oldy_cid=$newy_cid; $oldx_cid=$newx_cid; }

19 Plotting algorithms - basic code imageline() - make a line from A[x,y] to B[x,y] imagettftext() - print a characters into a chart imagecolorallocate() - get RGB color and use it imagesetthickness() - set the thickness for line

20 Web based user interface TestMaker user interface for quiz design generating hard links for or instant messaging list of all user tests

21 Main information sources PHP - PreHypertext Processor documentation MySQL - database storage documentation Sachy's integrated encyklopedia

22 Acknowledgment University of South Bohemia Štys's family, Karel Roháček and all other participating people Michal Wittner, Bára, Lucie and authors' friends & colleagues THIS PROJECT HAS RECEIVED FINANCIAL SUPPORT FROM THE EUROPEAN SOCIAL FUND AND FROM GOVERNMENT OF THE CZECH REPUBLIC