Tutorial 2: Vector Graphics

In this tutorial i will talk to you about vector graphics.

What we see in our everyday lives in our computer is a mix of vector graphics and raster graphics, although raster is much more used.

Raster graphics, or also called bit maps, displays the images with patterns of dots. If you enlarge a raster graphic image you will be able to see squares of different colors, this are called pixels.

In the other side Vector Graphics are displayed using a mathematical formula and are composed of geometrical primitives such as points, lines, curves, shapes and polygons.

The nice thing about vector graphics is that, if you zoom in, there's no distortion in it, you wont get a pixelated image. Every time you zoom in, the mathematical formula fixes the image to be displayed appropriately to a specific screen resolution. That's why vector graphics are more flexible than bit maps, they can be resized all the times you want never losing quality and the file size will stay the same.

The quality of a vector image is only limited by the resolution of the output display.

Here's a video i recorded resizing a typical RASTER graphic image using paint!

Its important to note that almost all output devices are raster based, so even if you have a vector graphic image, this will have to be converted to be showed in your screen, the thing is you wont see the pixelated image when you re size it because the mathematical formula will work in the background.


Moreover the graphic systems we know of such as CADD, work with vector graphics!

Just for you to know, programs that deal which vector graphics are called drawing programs , meanwhile programs that use raster graphics are called painting programs!

Some famous vector graphics file formats are:

-CGM (Computer Graphics Metafile)

-SVG (Scalable Vector Graphic)


Other formats associated with their vendors:

-CDR (CorelDraw)
-AI (Adobe Illustrator)
-ODG (Open Document Graphics)

And Many more...



Thank You for Reading!

Excel Project

This was the first Project i had to do for my ISM3004 Class. After watching several lectures introducing me to Excel and some of its advanced features i had to get my feet wet and experience a practical project. This project was about a Gymnasium that had measured and gathered information about its clients, specifically their age, gender and their heart rate. The owner of this Fitness Center hired us for helping her analyze the data mentioned.
The first part of this project was purely visual and very simple, we had to organize the data , bold some texts, center them and reshape them.
Later on we had to start using certain in built functions of Excel to do the task we were told to do. For example we were asked to search for the Highest Heart Rate of every customer. To do so, we used a very simple but powerful function named LARGE.
Moreover, we also had to use conditional statements in this project, the same that you use in programming. We had to use them for Printing out Yes or No in a cell depending if the client had accomplished the Target Heart Rate.
Furthermore, we could experience with relative and absolut addresing and mixing them both. We used this when we had to calculate the target Heart Rate using a constant percentage value of the Maximum Heart Rate.

Finally after gathering all that information we had to use the famous pivot tables to help us analize the data and count it all up. We had to do two pivot tables one which counted all the people by gender who could accomplish the target heart rate and the ones who did not. The other pivot table had to calculate the average heart rate increase from the beginning of the workout and when it finishes.


Here is a screen capture of my "AvgIncrease" Pivot Table:

GO GATORS!!