![[CRO] VL danas – nova greška u grafu](http://www.qualia.hr/wp-content/uploads/2013/01/VL-chartjunk-line-graph-191x191.png "[CRO] VL danas – nova greška u grafu")
[CRO] VL danas – nova greška u grafu
Danas smo u VL mogli čitati uglavnom o zdravstvenom odgoju i pripadajućim komentarima. Ipak, ono što mi je zapelo za oko, a primjereno je za ovaj blog, jest grafički prikaz povjerenja građana strankama u Hrvatskoj: Prije svega, graf nije loš po mnogo stvari. Kao kategorijska os izabrano je vrijeme, graf prikazuje trend tako da je linijski graf najprimjereniji ovdje. Dizajnerske zamjerke kreću se oko nepotrebnih iscrtkanih linija koje samo dodaju na “gužvi” na grafu, a ne...
Read More![[CRO] BusinessQ Scatter Plot – korelacije u mjerama](http://www.qualia.hr/wp-content/uploads/2013/01/businessq-scatter-plot-example-2-191x191.png "[CRO] BusinessQ Scatter Plot – korelacije u mjerama")
[CRO] BusinessQ Scatter Plot – korelacije u mjerama
Za kraj Q1 ove godine BusinessQ će doživjeti novu verziju. U njoj će se nalaziti mnoga poboljšanja, ubrzavanja algoritama, ali i potpuno nove funkcionalnosti i opcije vizualizacije podataka. Jedna od njih je i ScatterPlot. Ovaj tip grafa služi da se na vrlo brz način uoče eventualne korelacije među brojčanim podacima (mjerama, metrikama). O čemu se radi? Tradicionalni grafovi u pravilu prikazuju neke kategorije (Dimenzije, poput Artikli, Kupci, Mjeseci) i pripadajuće vrijednosti...
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How to Lie with Charts – part 2
There is an interesting project going on – A Farce with numbers. Organizer asked students to locate resources that showed how graphs and charts can mislead. What is (I think) very educational is that he also asked them to look at color theory, word-image association, juxtaposition, and other aesthetic methods of influencing meaning and interpretation. Unlike Forbes’ graph makeover contest in which I also participated here , thihs assignment is different and very...
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Forbes : Graph Makeover Contest
Naomi Robbins on Forbes.com presented a graph and a table and asked readers to present alternatives. I choose to improve this graph: The main reason is because there are far better ways to display this kind of information. I present 2 alternatives: 1) first of which is better to present part-in-the whole percentages of social media and quick comparison for b2b and b2c companies : (you can easily ask yourself – where did LinkedIn vanish for b2c?) 1) second of which is better to...
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Data viz challenge: How Teens Research
Yesterday I stumbled upon an article on storytellingwithdata.com. I quote the author: “I was surprised reading this article how many stats were included and yet how few visuals. Only one graph, in fact: My challenge to you is this: read the article and determine what data you find most interesting then visualize it. You can remake the above graph, or focus on bringing life to numbers included in the report by making them visual. ” So I decided to look at the article and...
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When to use Bar, Line or Area graph and Why?
Report builders are often in situation that they are presented with data about products revenue like : Then they are asked to visualize that data graphically in their report. Unfortunatelly, they will also very often try to do that in unappropriate way, with Pie charts. Edward Tufte in “The Visual Display of Quantitative Information” wrote that the only worse design than a pie chart is several of them, for then the viewer is asked to compare quantities located in spatial...
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LinkedIn Data Visualization Challenge
On Visual Analytics Group on LinkedIn there is an interesting discussion going on: “Based on the popularity of the Brian Bedrick’s “Looking for a Better Way to Display This Graph” post I thought it would be interesting to post another small data set and see what people come up with. I’ve found what I think might be an interesting data set here: http://www.calvin.edu/~stob/data/television.csv” We took the data and make some graphical representations on basic...
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Election chart junk – 3D column graph
Croatian parliamentary election 2011 is over. In all media now it is time to explain the results and to visualize statistics and quantative values. We can see various graphs on TV or in newspapers. Unfortunatelly, only small portion of those graphs are really explanatory with insights and scientific precision. For example, today I can read about number of seats in parliament won by each party. They are “explaining” quantitative value, number of seats, by this graph (this is photo...
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How to Lie with Graphs
Today in one Croatian newspaper I stumbled upon this graph. It is showing a distribution and comparison of gasoline prices over regions for two types of gasoline. On first look, there is nothing wrong at all with this graph: Then we examine further, let’s say upper graph for ‘Eurodizel’ gasoline. Graphs encode data as visual objects. Therefore, these objects have to be accurate and clear. At least, on this particular graph, objects are clear and overall graph design is...
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Pie Chart Controversy
Very often on the web one can find discussions related to the specific form of graphic representation of the part-to-whole relationships called the Pie Chart. Almost inexplicably but with great help from developers and Vendors of reporting and / or analytical tools, pie charts are recognized as not only legitimate, but also the best way of showing parts to whole. Moreover, to make data look even nicer, pies are made with special effects like transparency and three-dimensional display. Nothing...
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