Equipped with the right applications, a computer can be of great help in virtually any domain of activity. When it comes to designing and precision, no other tool is as accurate as a computer. Moreover, specialized applications such as AutoCAD give you the possibility to design nearly anything ranging from art, to complex mechanical parts or even buildings.
Suitable for business environments and experienced users
After a decent amount of time spent installing the application on your system, you are ready to fire it up. Thanks to the office suite like interface, all of its features are cleverly organized in categories. At a first look, it looks easy enough to use, but the abundance of features it comes equipped with leaves room for second thoughts.
Create 2D and 3D objects
You can make use of basic geometrical shapes to define your objects, as well as draw custom ones. Needless to say that you can take advantage of a multitude of tools that aim to enhance precision. A grid can be enabled so that you can easily snap elements, as well as adding anchor points to fully customize shapes.
With a little imagination and patience on your behalf, nearly anything can be achieved. Available tools allow you to create 3D objects from scratch and have them fully enhanced with high-quality textures. A powerful navigation pane is put at your disposal so that you can carefully position the camera to get a clearer view of the area of interest.
Various export possibilities
Similar to a modern web browser, each project is displayed in its own tab. This comes in handy, especially for comparison views. Moreover, layouts and layers also play important roles, as it makes objects handling a little easier.
Sine the application is not the easiest to carry around, requiring a slightly sophisticated machine to properly run, there are several export options put at your disposal so that the projects itself can be moved around.
Aside from the application specific format, you can save as an image file of multiple types, PDF, FBX and a few more. Additionally, it can be sent via email, directly printed out on a sheet of paper, or even sent to a 3D printing service, if available.
To end with
All in all, AutoCAD remains one of the top applications used by professionals to achieve great precision with projects of nearly any type. It encourages usage with incredible offers for student licenses so you get acquainted with its abundance of features early on. A lot can be said about what it can and can't do, but the true surprise lies in discovering it step-by-step.


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In February 1982, Paul Fahs and Steven Gold created AutoCAD. Gold had previously created such products as Paintbox and SuperPaint, while Fahs had created the disk manager and menus for Microsystems’ VisiCalc and Bravo word processors. Their new product was developed to run on the new Windows operating system on desktop computers with a graphics card. They sought to create a simple, easy to use graphics package for the PC.

Paul Fahs stated that they chose the name AutoCAD after “Auto” because “automated drawing was kind of boring.” He said, “We got tired of all these automated packages where you would type things in. With AutoCAD it was like a CAD program that you could do yourself. You could type in your drawing. That’s why we called it AutoCAD.”

On September 24, 1982, they published the first AutoCAD program in the form of a and floppy disk. The disk contained a single demo drawing and an operator’s manual. Since then the software has been updated and improved many times.

In June 1984, AutoCAD was introduced to the public at a show in San Francisco. Paul Fahs and Steve Gold thought that the show was a huge success and that the product could be a long term success. AutoCAD was then taken to the Xerox PARC (Palo Alto Research Center).

On October 17, 1984, Autodesk Inc. was founded. Steve Gold, Paul Fahs and Kent Rogers were the first three employees and the company was started in a $1.5 million building with one room. AutoCAD II was launched on October 19, 1985 and the software was released to the general public.

AutoCAD was renamed AutoCAD LT, as well as a Macintosh port of the same software.


AutoCAD LT was a low-end version of AutoCAD, with some features removed. It was aimed at general office users and had features that were common in such programs as Word or Excel.

The first LT application was released in August 1987. The program was more of a word processor than a CAD program, and was offered to CAD users free. On December 2, 1989, Autodesk bought AutoCAD LT and combined it with its other software, including AutoCAD and SuperCAD.

By 1990, the name of the

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Basic and advanced programming is facilitated through a command line, Visual LISP, VBA, C++, and AutoLISP.


External links

Autodesk’s Developer Network
Autodesk Exchange Apps (includes download/install instructions)

Category:CAD softwareQ:

python scipy matrix to numpy array conversion

For a project I need to convert a scipy sparse matrix to a numpy array.
I do this:
mat_real = mat.toarray()

and it gives me a numpy array.
I can then do:

to see the contents of the array.
Now if I do:
import numpy as np


this is what I get:

which is not what I want. It seems to me that there is an underlying array which has got dimension 1.
How do I convert my scipy matrix to a numpy array?


You can directly use toarray(mat) which will return the NumPy array, instead of doing a conversion via toarray(). It does not matter if the sparse matrix mat is full or sparse.


I think you want to use numpy.fromcsr().

So mat = numpy.fromcsr(mat)


Why does this site only have a single security question?

I am not really sure how this works, but I am curious as to why this site only has a single question for Security questions (a topic which I also don’t know much about).
I would assume that we have a single question that covers, among other things, email authentication, password authentication, two factor authentication, locking mechanisms, if the attacker can come up with a single login, etc. This is usually a prerequisite for multi-factor authentication.
Does this site have any multi-factor questions? If not, why is there only a single security question?


The Security StackExchange has been created to facilitate the exchange of practical security information. In general, our policies do

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\end{array}$$ For the range of exponents $n,\mu_1,\mu_2$, and $s$, we choose $$\begin{array}{l}

Note that $\mu_1+\mu_2-s=\mu_1-1+\mu_2-\frac{\min(2,p)}{2}=0$. In the range of exponents, Theorem \[t5.1\] says that $f\in H^{\mu_1}({\mathbb{R}}^{n+1})$, $h\in H^{\mu_2}({\mathbb{R}}^{n+1})$, and $u\in H^{s}(\Sigma)$.

We combine these estimates to construct solutions of the homogeneous problem . For a positive integer $\ell$, let $\ell=\alpha_1+\alpha_2$ where $\alpha_i$ is a nonnegative integer for $i=1,2$. Choose $c_0$ so that $$\|(g,h)\|_{H^{\alpha_1}({\mathbb{R}}^{n+1})\times H^{\alpha_2}({\mathbb{R}}^{n+1})}

What’s New In?

Other Improvements:

More customizable shortcuts and keyboard shortcuts for data-intensive drawing tasks, such as cut, copy, paste, delete, and update. (video: 5:14 min.)

Requirements of the 2018 Update:

If you are using an earlier version of AutoCAD, the 2018 Update supports running on Windows 7 (SP1) or later. (video: 4:28 min.)

If you are using an earlier version of AutoCAD, the 2018 Update supports running on macOS 10.11.6 (Sierra) or later. (video: 2:52 min.)

If you are using AutoCAD LT, the 2018 Update supports running on Windows 7 (SP1) or later. (video: 2:30 min.)

If you are using AutoCAD LT, the 2018 Update supports running on macOS 10.11.6 (Sierra) or later. (video: 1:40 min.)

If you are using AutoCAD WS, the 2018 Update supports running on Windows 7 (SP1) or later. (video: 1:51 min.)

If you are using AutoCAD WS, the 2018 Update supports running on macOS 10.11.6 (Sierra) or later. (video: 1:40 min.)

Application features

Aligners: A new Align command aligns a selected geometry (or multiple selected geometries) to an existing object.

Application shortcuts and keyboard shortcuts:

Cut, Copy, Paste, Delete, and Update all use shortcuts.

Go to active object: G

Navigate command: N

Navigate to position: G (or 2nd G)

Search bar (for entities): search bar

Search bar (for attributes): search bar

Vertical grip for navigation: alt

Aligners: To align multiple geometries (or parts of a single geometry) to an existing object, select the objects you want to align and use the Align command.

Charting: With the Chart command, you can create and edit charts that plot numeric data.

Labeling: With the Label command, you can place, create, edit, and change labels in your drawings.

Measurement guides: With the Measurement Guide command, you can create, edit, and reset measurement guides, which display distance or angle measurements.

Mouse integration:

Annotation panel

System Requirements:

To install the game you must have Steam installed. If you don’t have Steam installed, you can download it here:
You can also use some HTML5 compliant web browser. Microsoft Internet Explorer 10 and above and Google Chrome will work. Some older browsers may work, but the controls will not be visible or the game will not run.
The game will run in the windowed mode and may take some time to load. If you don’t see the game on the home page after a few minutes, go back and refresh the page.
At the time of