I have a lot of data to plot in a single plot window and it looks really ugly and not understandable. Moreover legends are coming on to the curves which make curves unreadable. I cannot put curve alone one by one into my latex report which makes it again difficult to maneuver between the plots.
My question is- can't it be possible to put all the curves in single plot generated from gnu plot which can be easily maneuver back and forth in a single plot window the latex report?
I know a bit about tikz pictures where no of frameworks can be easily accessible in single plot.
can't it be used for a whole curves one by one assuming as different frame work. and at last all the plots in the the plot window.
It would be very helpful if is possible so.
I have data with N rows and M columns in it. I need plots of N rows vs. each column separately to be shown in each frame in Latex generated report and in the last frame all the curves should be present. I need a proper procedure to follow to animate the curves.
Yes, this kind of thing can be done with the animate package in latex. I have successfully used it in the past for presentations that I put together with beamer. You could switch between different gnuplot graphs that are loaded into the animateinline environment, but you can also use pgfplots within tikz to modify the plot directly on your latex document without need for an external plot.
Using animate requires investing a bit of time at the beginning but the results can be very nice. Also, Okular (and I'm guessing other PDF viewers as well) seem to have trouble visualizing the animations but Adobe reader (acroread on linux) loads them without problems.
As an example, you can check a 5-minute presentation I put together last year: in slides 4 and 5 you can use the buttons to run the animation. The one in slide 4 includes plotting a gaussian with pgfplots changing the curve parameters between frames. You need to open it with the Adobe reader for it to play correctly.
Related
I am trying to build a gantt control with Konva (does it make sense to use Konva for this)? I have tried to sketch the control below:
I was thinking of breaking down the Konvas stage as follows:
One stage with 4 layers: activity names, timeline, activity views, and scrollbar view.
The scrollbar layer would contain a "custom control" mimicking a standard scrollbar control.
At this stage I have a couple if questions:
What would be the best approach for synchronizing the different layers from an event handling perspective? For example if the user click's on the scrollbar's down arrow shape, I would need to "scroll" all layers one unit down.
How does the Konva coordinate system work? Is the drawing of shapes done relative to the containing layer?
What's the difference between a layer and a group? Does it make more sense to use a group instead of layers?
I realize my questions are very broad in nature, but at this point I need to get the design right.
I am responding here rather than as a comment because I have more to say than a comment allows.
I have made Gantts with both HTML elements, and another canvas lib, and Konva. I used Divs with jquery first and it was viable but I felt it got quite complicated and it ran out of steam in the area of zooming the view. You can't hide from the complexity of course. Switching to HTML5 canvas I realised that a lib like Konva would accelerate production. And zooming in canvas is simple.
As per #lavrton's comment, the text is primitive on HTML5 canvas when compared to GDI, or other, more mature tech. My answer for the labels on tasks was to use off-screen text drawing then converting to images which works very well. For popup editing, I revert to HTML divs etc. I did not use animations in the Gantt but I have elsewhere and canvas should be fine - there are plenty of bouncy-ball / particle tests around to confirm that.
As a coding design suggestion, the data model and functionality of the Gantt is consistent whatever tech you use to draw it with. I recommend you consider proceeding with a layered approach where your interaction with drawing functions is wrapped as class methods in a drawing class so that you can switch out the drawing tech itself should you feel the need. You could insulate yourself from the choice of tech and/or library that way.
Turning to aspects of your question:
layers are a useful concept. Physically each layer is an HTML5 canvas element. So multiple layers in one diagram are really multiple canvases over the same stage. The benefit here is in redrawing specific layers instead of the entire canvas where there are performance savings. But mostly you can ignore the physical and just get on and use the concept which works well.
groups: a group is a collection of shapes on a layer. If you have to draw things made of many shapes, grouping them is very useful because you can move the group as a whole, hide it, delete it, etc. You might, for example, consider making each taskbar, composed of at least a rectangle and text, as being a group. One consideration for groups is that the location and size of the group is that of the bounding rectangle that encloses the shapes within it. This can cause some confusion until you work out an approach. You will find yourself using layers and groups, but mostly groups for drawing controls.
Zooming / scaling: this is easy with a canvas. Less easy is the math for how to change the offset to keep the same view as you zoom, but again it is achievable.
Synchronised scrolling layers is not going to take any time to develop - just set the layer y-position for each layer.
Drawing the grid of rows for activity and columns for days/weeks/months/etc should not be underestimated as a task, but as you develop it you will learn the fundamentals of working with Konva.
Final point - the docs and examples for Konva could be a bit better, but the community support here and at https://konvajs.github.io/docs/ is good, and the Konva source code is also at that site so you can delve right in to understand what is happening, though you do not need to do that at all if it is not your thing.
In my app, i got core plot bar chart on a scroll view with paging, on IPhone all work fine , you page between different pages, one of them is the plot with its own touch gestures and properties.
Problem starts when i run the same code on IPad. plot becomes slow and laggy, all touch gestures takes a lot of time to response and the whole scroller paging becomes heavy and slow.
the chart itself contains 100 points or so (not so big).
I've read somewhere that the change of plot space between IPhone and IPad makes these changes in performance because the IPad renders 4 times the graphics. Did anybody had this problem before? Is there something i can do to make performance better on IPad without limit or lose preform data?
Unfortunately Core plot is a very slow library which can only handle a few hundred data-points (or less in some cases).
I wrote an answer here which describes a performance comparison between iOS chart components. One of the charts tested was core-plot and it couldn't do the first test!
Without knowing the specifics of your app, here are some general performance hints:
Set all line styles and fills that you don't need to nil rather than transparent colors.
Use solid color fills rather than gradients or images where possible.
Reduce the number of axis labels, tick marks, and grid lines if possible. Perhaps eliminate minor tick marks and grid lines completely (set the corresponding line styles to nil).
Only call -reloadData when a significant portion of the plot data changes. Use the insert and delete methods when possible. See the "Real Time Plot" in the Plot Gallery example app.
SPSS' default settings for graphs are pretty rudimentary and, generally, ugly.
I have just upgraded from v.12 to v.21 and am very surprised, and extremely disappointed, to see that there is practically no change.
I had high hopes for GPL, but it does not seem to offer anything more than basic settings.
For instance, I want to create a sequence of scatterplots.
The dimension should be 375 points square.
Both axes should go to 1,000.
The points should be size 1, colour dark red.
The chart background should be white.
I also want to create a sequence of scatterplots.
The dimension should be 375 points square.
X axis should go to 1,000,
Y axis to 160.
There should be 50 bins - (x-axis, number of intervals).
Display digit grouping should be on.
Histogram bar fill and border should be colour a and colour b (these will vary, but should be scripted).
Finally, a set of box plots which also need customisation away from the default settings.
So, is it possible to script customisations like this, or do I have to go through the VERY SLOW and TEDIOUS point and click process for every one?
I HAVE 105 GRAPHS!
Thanks for your advice.
GPL provides syntax control for all of these things. The graphics engine in V21 is entirely different and much more flexible than the ancient on in V12.
The Chart Builder UI offers only basic, general controls. There is a huge amount of functionality in GPL that is not exposed in the CB. Paste the syntax from that as a starting point, and look at the GPL documentation in the help. You may also want to create a template with your specifications and use that from the CB as a shortcut.
The GraphBoard editor provides another interface ultimately to the same graphics engine. It offers more aesthetic control but is harder to customize.
I'm coding iOS app that will explain complex numbers to the user. Complex numbers can be displayed in Cartesian coordinates and that's what I want to do; print one or more vectors on the screen.
I am looking for the easiest way to print 3 vectors into a coordinate system that will adjust itself to the vector-size (if x-coord is > y-coord adjust both axis to x-coord and vice versa).
I tried using Core Plot, which I think is way too multifunctional for my purpose.
Right now I am working with PowerPlot and my coordinate system looks okay already, but I still encounter some problems (x- and y-axis are set to the x and y values which results in a 45 degree angled line, no matter the user input).
The functionality of the examples in CorePlot and PowerPlot don't seem to meet my needs.
My last two approaches were using HTML and a web view, and doing it all myself with Quartz (not the simple way...)
Do you have any advice how to do this the simple way, as it is a simple problem, I guess?
If you're not wanting to do much actual graphing and plotting, then using Core Plot or similar sounds like overkill to me. The extra bloat of adding coreplot to your project, not to mention the time taken for you to understand how to use it, might not be worth it for some simple graphics.
Quartz is well equipped for the job of showing a few vectors on the screen, assuming you're not interested in fancy 3D graphics. There are plenty of tutorials and examples of using Core Graphics (AKA Quartz) to draw lines etc. If you're going the Quartz route, perhaps get some simple line drawing going in Quartz, then ask more questions if you need help with the maths aspect of it.
The typical technique used when rendering with Quartz is to override drawRect in a subclass of UIView and place calls to Core Graphics drawing functions in there.
A decent question and example of Quartz line drawing is here:
How do I draw a line on the iPhone?
If you aren't adverse to using Google Chart Image you can load reasonably complex data sets in a simple manner by calling the appropriate URL and then putting the image in a UIImageView. It takes very little code: here is a blog post explanation with sample code.
The limitations are
length of the data set is restricted by the max URL length you can request from Google (2048 characters, with encoding is large), though I've plotted with 120 data points in 4 series.
a net connection is required (at least to get the initial chart)
and perhaps the biggest problem, API is deprecated and will be discontinued in 2015 at some point. You would then have to switch to the UIWebView/Javascript Google Chart API implementation...
Sample image:
I want to draw a couple of simple bar plots to include in a LaTeX document.
For some reason (unless im missing something), there doesn't appear to be a simple way to generate bar plots in LaTeX.
I could of course generate them in Excel and save them as PDF, but I'd rather have the flexibility of doing them dynamically in LaTeX.
I looked into TikZ, but it seems nobody on the interwebs is using it for a measly barchart (which is what I need it for), and the code below generates a barplot without any axis:
\begin{tikzpicture}[scale=2]
\draw[ycomb, color=gray,line width=0.5cm]
plot coordinates{(1,1) (2,2) (3,3)};
\end{tikzpicture}
What do you use? Am I doing something horribly wrong?
I'd say you want pgfplots: this is built on top of Tikz as a proper plot-drawing interface.
I do not know if you're familiar with gnuplot, that can generate bar plots. There is a "TikZ terminal" (something that outputs TikZ-code) for gnuplot, however, as far as i know, you have to compile it yourself in order to get it working.
I think there's also another "LaTeX terminal" generating pstricks (?) code or something similar.
Can I point you towards Asymptote (Wiki, Gallery). You can make professional looking graphs offline from LaTex processing, but being LaTeX aware. It is a full blown C-ish language for vector graphics and function graphing. The output eventually is encapsulated postscript (eps) which can be displayed directly into LaTeX documents.