Presentation - Perl and Excel

Hi all -

I gave a presentation at the Chicago Perl Mongers group on 06/25/2015 on using Perl to read and write Excel files. There is a brief discussion on the different modules for handling the 2003 and earlier .xls files, as well as the 2007 and later .xlsx files.

Writing data with different formats for headers and data, as well as including Excel comments is shown. Comments can be used to programmatically highlight items for additional information as shown in the picture.


FInally, creating a chart using data from a random number generator was discussed. Chart parameters for the X and Y axis, such as min and max values, major and minor grids, as well as chart type and size is covered. The chart parameters needed for the chart shown are covered.


The PDF presentation can be viewed at or downloaded from

Please let me know if you have any questions or comments.

Taking Risks while Developing Code

As the coding geek behind Custom Visuals, I’m responsible for the application development that takes place under this roof. About half of my livelihood since 1984 has been as a small business application developer and the other half as a software engineer in larger corporations. They both have advantages and disadvantages, and I have no reason to, or intention of, putting down either one. There is one big difference that has always stood out to me and I’ve commented on it with friends and colleagues a few times in the last decade or two.

In the corporate environments I’ve worked in, there is a premium for churning out predictable code to solve problems in acceptable ways using the tools provided. Straying from the preferred path in the corporate environment is not encouraged, which leads to a familiar looking code base, but also higher levels of technical stagnation. Bringing new ways of solving problems, connecting to databases, accessing websites or even changing the logging approach to something that allows easier troubleshooting means that your code sticks out like a sore thumb since it is different from the rest of the company standards. The upside of sticking with the standards is that is anyone in your immediate group, or perhaps throughout the entire organization, can more quickly follow and understand your code and make any necessary changes.

As one of the founders of Custom Visuals, I have a much higher amount of freedom to explore areas that are not placed directly in front of me. Taking the programming language Perl as an example, I can decide to update to a newer version of a CPAN module without worrying how it will affect groups that are not part of my immediate circle. By running a few tests or if I have something in my ever-growing test suite that exercises the new module, I can test and deploy the module in a matter of minutes. This helps to keep the code base modern and remove some of the cruft that inevitably creeps into projects over time.

In the larger scheme, this means I can evaluate entirely new concepts, libraries, languages, technologies, etc. and decide whether it makes it into the project or not. It also means my experience and knowledge of new areas grows, as well. While working on projects within Custom Visuals, I may take more time to explore a new concept before figuring out how to steer a project into what I already know how to use. In the short run, this likely means a single project takes a little longer to develop while some additional learning and experimenting takes place. In the longer run, this means projects have more tools available to make development quicker and more flexible.

From a broader perspective, I have found a nice balance of technical learning and basic implementation in both environments. There is always something to learn in both and there is also a chance that you will stray into the wilderness while implementing a new idea. Knowing when and how to implement new ideas is based on experience.

WELCOME TO Custom Visuals, LLC

This is our first blog and we wanted to welcome all of you ! We thank you for your interest in our services.

Please take your time perusing our website!  Feel free to ask questions, leave comments or suggestions  and by all means, feel free to share this with your friends.

We invite each of you to participate on our Facebook with any weather videos or photo’s from the area in which you live. If you have visited another country and would like to share your images, we welcome it.

Newer Posts

Custom Post Images

© 2003-2021      Custom Visuals, LLC      Privacy Policy      Sitemap