How to draw a line graph using javascript

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QAIX > Javascript web-programming > How to draw a line graph using javascript 29 September 2008 13:06:05

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How to draw a line graph using javascript
Srinivas 29 September 2008 13:06:05
	Hi all, I have one requirement.Is there any way to create a line graph using javascript.If it is please send me the sample code.But the thing is it should work in all browsers. Thanks, Srinivas
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Evertjan. 25 October 2005 18:16:25 [ permanent link ]
	srinivas wrote on 25 okt 2005 in comp.lang.javascript:> I have one requirement.Is there any way to create a line graph> using javascript.If it is please send me the sample code.But the thing> is it should work in all browsers. For IE and probably other browsers too: <http://groups.google.com/group/microsoft.public.scripting.jscript /msg/2eb29ecafa6105bf> -- Evertjan. The Netherlands. (Replace all crosses with dots in my emailaddress)
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Cwdjrxyz@Yahoo.Com 25 October 2005 18:56:41 [ permanent link ]
	Evertjan. wrote:> srinivas wrote on 25 okt 2005 in comp.lang.javascript:> > I have one requirement.Is there any way to create a line graph> > using javascript.If it is please send me the sample code.But the thing> > is it should work in all browsers.> For IE and probably other browsers too:> <http://groups.google.com/group/microsoft.public.scripting.jscript> /msg/2eb29ecafa6105bf> Yes, you sometimes can create a simple graph with JS as suggested. However if you do much of this, or wish to graph complex curves or data-fit the curve to many points with some scatter, you need a math program. The commercial programs are rather expensive. However you can find a few free ones such as DataPlot. Such programs usually use a higher level language such as Fortran or C+, but they are compiled so that you do not have to have a compiler for the language installed on your PC, and you do not have to know anything about a higher level language to use them. These programs will draw the curve, show individual data points if desired, and give the numerical units and labels. Then you just use an image program to adjust the size as desired and output as a jpg or other format suited for the web. This method also has the advantage that it will work on any browser that can view a jpg, even if script is turned off. It also saves you a large amount of time if you use plots on the web very often. The down side is that it can take a bit of time to learn how to use the math program the first time.
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Randy Webb 25 October 2005 19:06:44 [ permanent link ]
	srinivas said the following on 10/25/2005 11:04 AM: Hi all,> I have one requirement. And it is an impossible requirement. Is there any way to create a line graph using javascript. Yes. If it is please send me the sample code. Search the archives, produce your first attempt, post it here. This is a Usenet discussion group, not a free "do my homework for me" group. But the thing is it should work in all browsers. That "thing" is what makes your requirement impossible. -- Randy comp.lang.javascript FAQ - http://jibbering.com/faq & newsgroup weekly
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Vk 25 October 2005 20:41:13 [ permanent link ]
	I have one requirement.Is there any way to create a line graph> using javascript.If it is please send me the sample code.But the thing> is it should work in all browsers. Look at: <http://www.geocities.com/schools_ring/archives/VML_SVG.html> (click on graph canvas to mark new points) You can get the sample from: <http://www.geocities.com/schools_ring/archives/VML_SVG.zip> This VML script will work by default (no extra installations needed) for all IE users (~82%) Add SVG equivalents to cover the rest of the Web. For now it will require SVG plugin installation. But the incoming major release of FireFox (1.5) will have SVG support build-in. Between VML & SVG (build-in or plugin) you cover all the web except terminal browsers and few deviants you can crew on.
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Vk 25 October 2005 20:47:30 [ permanent link ]
	few deviants you can crew on. Just got on me that it sounds ambiguous. Of course I did not mean any physical impairment but people who prefer to use some totally fantastic browsers.
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Cwdjrxyz@Yahoo.Com 26 October 2005 00:24:16 [ permanent link ]
	cwdjrxyz@yahoo.com wrote:> Evertjan. wrote:> > srinivas wrote on 25 okt 2005 in comp.lang.javascript:> > > I have one requirement.Is there any way to create a line graph> > > using javascript.If it is please send me the sample code.But the thing> > > is it should work in all browsers.> > For IE and probably other browsers too:> > <http://groups.google.com/group/microsoft.public.scripting.jscript> > /msg/2eb29ecafa6105bf>> Yes, you sometimes can create a simple graph with JS as suggested.> However if you do much of this, or wish to graph complex curves or> data-fit the curve to many points with some scatter, you need a math> program. The commercial programs are rather expensive. However you can> find a few free ones such as DataPlot. Such programs usually use a> higher level language such as Fortran or C+, but they are compiled so> that you do not have to have a compiler for the language installed on> your PC, and you do not have to know anything about a higher level> language to use them. These programs will draw the curve, show> individual data points if desired, and give the numerical units and> labels. Then you just use an image program to adjust the size as> desired and output as a jpg or other format suited for the web. This> method also has the advantage that it will work on any browser that can> view a jpg, even if script is turned off. It also saves you a large> amount of time if you use plots on the web very often. The down side is> that it can take a bit of time to learn how to use the math program the> first time. If you are wanting to draw a curve that can be calculated from a standard math formula rather than by fitting a curve to experimental measurements with some scatter, then you can use the JS math functions to do this. An old example of mine is at http://www.cwdjr.net/math/bessel_function2.html . This plots the Bessel function J0 . Since J0 is not part of JS math, this function is evaluated from the definition of it, using the JS math functions that are available. I have done a lot of math, so doing math using JS is no problem for me. However those without a math background might find this sort of thing difficult. Of course if you just want to plot some basic math function such as sin that is built into JS, then there is nothing difficult to calculate.
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Aundro 26 October 2005 10:48:29 [ permanent link ]
	"srinivas" <nivas.meda@gmail.com> writes: Hi all,> I have one requirement.Is there any way to create a line graph> using javascript.If it is please send me the sample code.But the thing> is it should work in all browsers.> Thanks,> Srinivas> Maybe that will help: http://www.walterzorn.com/ A. -- Arnaud DIEDEREN Software Developer IONIC Software Rue de Wallonie, 18 - 4460 Grace-Hollogne - Belgium Tel: +32.4.3640364 - Fax: +32.4.2534737 mailto:ad@ionicsoft.com http://www.ionicsoft.com
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Dr John Stockton 26 October 2005 16:23:13 [ permanent link ]
	JRS: In article <6didnYn9zb2excPeRVn-jQ@comcast.com>, dated Tue, 25 Oct 2005 12:06:44, seen in news:comp.lang.javascript, Randy Webb <HikksNotAtHome@aol.com> posted :>srinivas said the following on 10/25/2005 11:04 AM: I have one requirement.> And it is an impossible requirement.> Is there any way to create a line graph using javascript. But the thing is it should work in all browsers.> That "thing" is what makes your requirement impossible. Well, it's pretty difficult to see how it could be done in Lynx, unless Ascii-art is adequate, in which case any browser that can handle script should do. How many images can one put on a single page, if the images themselves are simple? In graphics\, fig-dot.gif (if I remember to upload it; otherwise use fig-_) and fig-0.gif are here images of dot and 0, but pretend they are white and black bricks and smaller. Then the following javascript code, tested in my js-quick.htm, generated a very crude diagram of a black- filled parabola. for (y=-6;y<7;y++) { for (x=-2;x<15;x++) { Z = ["dot", "0"][+(2x>yy)] document.writeln("<img src='graphics/fig-", Z, ".gif'>") } document.writeln("<br>") } On a more recent machine, presumably more images can be used at reasonable speed. Also, if you prepare a set of 64 square GIFs, one for each combination of the 8 principal spokes being present or absent, you can generate a line drawing by computing which to write in a grid. If they are transparent GIFs, then I think you can absolutely position them on top of each other, and stretch/squash them to get lines at computed angles. The axes, of course, would be prepared as a single GIF, if of constant scale. You'd prepare your data as a list or array, of course, and run through it computing the output of each element. If you can use only more recent browsers, you should probably use DOM methods to construct the relevant part of the page. Note also that HTML can display a BMP file, and AIUI the BMP format is simple. You could use an application to compute a BMP, by adding your overlay to your template, and display that. -- В© John Stockton, Surrey, UK. ?@merlyn.demon.co.uk Turnpike v4.00 MIME. В© Web <URL:http://www.merlyn.demon.co.uk/> - FAQish topics, acronyms, & links. The Big-8 newsgroup management is attempting to legitimise its questionable practices while retaining its elitist hegemony. Read <URL:news:news.groups>.
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Randy Webb 26 October 2005 21:04:43 [ permanent link ]
	Dr John Stockton said the following on 10/26/2005 9:23 AM: JRS: In article <6didnYn9zb2excPeRVn-jQ@comcast.com>, dated Tue, 25 Oct> 2005 12:06:44, seen in news:comp.lang.javascript, Randy Webb> <HikksNotAtHome@aol.com> posted :> srinivas said the following on 10/25/2005 11:04 AM:> I have one requirement.>> And it is an impossible requirement.>> Is there any way to create a line graph using javascript.> But the thing is it should work in all browsers.>> That "thing" is what makes your requirement impossible.> Well, it's pretty difficult to see how it could be done in Lynx, unless> Ascii-art is adequate, in which case any browser that can handle script> should do. And non-JS browsers? That was the reason behing my "impossible requirement". You could always simple generate the image on the server, send it to the browser. But you still fall into the non-image capable browsers. How many images can one put on a single page, if the images themselves> are simple? It's unlimited, based solely on the externals of the browser. RAM, CPU, etc. This page: <URL: http://members.aol.com/_ht_a/HikksNotAtHome/graphit/index.html > Is one that was written a while back that allows a user to click on two points and a line is drawn between them. It uses a 1x1 gif image and moves them accordingly. Any grid larger than the one there tended to get extremely slow to the point of hanging the browser. -- Randy comp.lang.javascript FAQ - http://jibbering.com/faq & newsgroup weekly
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Dr John Stockton 27 October 2005 14:32:46 [ permanent link ]
	JRS: In article <q-KdnXqDwcq1WMLenZ2dnUVZ_smdnZ2d@comcast.com>, dated Wed, 26 Oct 2005 14:04:43, seen in news:comp.lang.javascript, Randy Webb <HikksNotAtHome@aol.com> posted :>Dr John Stockton said the following on 10/26/2005 9:23 AM:> JRS: In article <6didnYn9zb2excPeRVn-jQ@comcast.com>, dated Tue, 25 Oct>> 2005 12:06:44, seen in news:comp.lang.javascript, Randy Webb>> <HikksNotAtHome@aol.com> posted :>> srinivas said the following on 10/25/2005 11:04 AM:>> I have one requirement.>>> And it is an impossible requirement.>>> Is there any way to create a line graph using javascript.>> But the thing is it should work in all browsers.>>> That "thing" is what makes your requirement impossible.>> Well, it's pretty difficult to see how it could be done in Lynx, unless>> Ascii-art is adequate, in which case any browser that can handle script>> should do.> And non-JS browsers? > ... Since the OP put "using javascript" ahead of "all browsers", ISTM that he really meant "all javascript-enabled browsers". It seems likely that he intends to use script to compose the graph. So I was not denying that your sentence was applicable to the one preceding it; merely pointing out its fundamental irrelevance. -- В© John Stockton, Surrey, UK. ?@merlyn.demon.co.uk Turnpike v4.00 IE 4 В© <URL:http://www.jibbering.com/faq/> JL/RC: FAQ of news:comp.lang.javascript <URL:http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources. <URL:http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.
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Randy Webb 28 October 2005 00:09:48 [ permanent link ]
	Dr John Stockton said the following on 10/27/2005 7:32 AM: JRS: In article <q-KdnXqDwcq1WMLenZ2dnUVZ_smdnZ2d@comcast.com>, dated> Wed, 26 Oct 2005 14:04:43, seen in news:comp.lang.javascript, Randy Webb> <HikksNotAtHome@aol.com> posted :> Dr John Stockton said the following on 10/26/2005 9:23 AM:>> JRS: In article <6didnYn9zb2excPeRVn-jQ@comcast.com>, dated Tue, 25 Oct>>>2005 12:06:44, seen in news:comp.lang.javascript, Randy Webb>>><HikksNotAtHome@aol.com> posted :>>> srinivas said the following on 10/25/2005 11:04 AM:>>> I have one requirement.>>>> And it is an impossible requirement.>>>> Is there any way to create a line graph using javascript.>>> But the thing is it should work in all browsers.>>>> That "thing" is what makes your requirement impossible.>>> Well, it's pretty difficult to see how it could be done in Lynx, unless>>>Ascii-art is adequate, in which case any browser that can handle script>>>should do.>> And non-JS browsers? >>...> Since the OP put "using javascript" ahead of "all browsers", ISTM that> he really meant "all javascript-enabled browsers". It seems likely that> he intends to use script to compose the graph. I have no desire and no intentions of trying to figure out "what he really meant". I read what he typed, I interpreted it literally, and I answered correctly. If you can't handle it, move on. So I was not denying that your sentence was applicable to the one> preceding it; merely pointing out its fundamental irrelevance. In your eyes. Try reality for a change John. -- Randy comp.lang.javascript FAQ - http://jibbering.com/faq & newsgroup weekly
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Guest 29 September 2008 13:06:05 [ permanent link ]
	i would like to ask for a code for creating grapgh using java script.thank you
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QAIX > Javascript web-programming > How to draw a line graph using javascript 29 September 2008 13:06:05

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