computer science

Veusz

Veusz is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Veusz rather than just read about it. In short: Veusz is a scientific plotting package. Veusz is a Qt application written in Python, PyQt and NumPy.

Key takeaways

Veusz belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Veusz to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Veusz from memory before moving on to harder problems.

Reference excerpt

Veusz is a scientific plotting package. Veusz is a Qt application written in Python, PyQt and NumPy. It is freely available for anyone to distribute under the terms of the GPL. It is designed to produce publication-quality plots. The name should be pronounced as "views". This program produces plots in popular vector image formats, including PDF, PostScript and SVG. It is cross-platform, working under Microsoft Windows, macOS and Unix/Linux. Plots are built up from a set of plotting widgets which can be added to the document and whose properties are edited using a consistent interface. For example, graph widgets can be placed within a grid widget to create an array of graphs. Widgets include X-Y plots, functions, contours, box plots, polar plots, ternary plots, vector plots, data images, labels and a variety of shapes. Datasets can be read using standard formats such as CSV, HDF5 or FITS, or entered, edited or created using functions from existing datasets. Functions can also be fitted to data. Veusz is extensible with Python plugins. Plugins can be added for importing data in other formats, automating operations and creating different kinds of mathematical relationships between datasets. The program also provides a command line and scripting interface (based on Python) to its plotting facilities. The saved file format is a simple Python text script, which makes it easy to create plots from other programs. Veusz was reviewed by Linux Format magazine, saying that "There's plenty of scope for creating colourful, engaging graphics". It was also included in their "Hot Pics" selection on their cover disc. Veusz can also be used as a drawing backend for the SciTools Easyviz package.

References

External links Official website of Veusz Veusz wiki on GitHub

Illustrations

Worked examples

Example 1 — a first encounter with Veusz

Start with the simplest possible case. Write down what Veusz claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Veusz before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Veusz ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Veusz

In research: Veusz appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Veusz in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Veusz is common in secondary-school and first-year university syllabi. It links to neighbouring topics Free plotting software, Free software programmed in Python, Free software projects, so understanding it makes those chapters shorter.
In everyday life: Look for Veusz outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Veusz in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Veusz means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Veusz out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Veusz in simple terms?

Veusz is a scientific plotting package. Veusz is a Qt application written in Python, PyQt and NumPy.

Why does Veusz matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Veusz?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Veusz.