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en:mervis-analytics:10-carpet-charts [2019/04/17 12:15] j.siroky |
en:mervis-analytics:10-carpet-charts [2019/04/24 09:57] (current) |
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===== Carpet plots ===== | ===== Carpet plots ===== | ||
- | Carpet plots do represent an efficient way for first visual data analysis. Beside classical carpet plot (or heatmap) we do use more sophisticated plots with aggregations. The basic principle is similar to pivot tables and pivot plots. User defines columns, rows and fold function. | + | Carpet plots represent an efficient way for the first visual data analysis. Beside classical carpet plot (or heatmap) we use more sophisticated plots with aggregations. The basic principle is similar to pivot tables and pivot plots. User defines columns, rows and fold function. |
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+ | Below are examples of useful carpet plot applications. | ||
- | Below are examples of useful carpet chars applications. | ||
==== Electrical heating ==== | ==== Electrical heating ==== | ||
- | plots capture average electrical energy consumption during a week. In this case, electricity is used for heating, as can be seen from the first plot (horizontal axis: hour in day, vertical axis: month). There is clear start and end of heating season. | + | Plots capture average electrical energy consumption during a week. In this case, electricity is used for heating, as can be seen from the first plot (horizontal axis: hour in day, vertical axis: month). There is a clear start and end of heating season. |
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- | Detailed look at weekly schedule shows that heating starts at 4 am during working days, except of Monday, when it starts at midnight, see next plot (horizontal axis: hour in day, vertical axis: day of week). There is a clear end of working hours, as expected in case of this office building. | + | |
+ | Detailed look at weekly schedule shows that heating starts at 4 am during working days, except of Monday, when it starts at midnight (horizontal axis: hour in day, vertical axis: day of week). There is a clear end of working hours, as expected in case of this office building. | ||
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==== Cooling outside working hours ==== | ==== Cooling outside working hours ==== | ||
- | Increase of electrical energy use during summer is usually | + | Increase of electrical energy use during summer is usually |
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==== CO2 concentration ==== | ==== CO2 concentration ==== | ||
- | Evaluation of CO2 by means of carpet plot can also provide | + | Evaluation of CO2 by means of carpet plot can also provide |
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==== AHU pressure difference ==== | ==== AHU pressure difference ==== | ||
- | HVAC appliance operation can be investigated by means of carpet plots as well. Bellow is a carpet plot (horizontal axis: day, vertical axis: hour of day) of AHU pressure difference. It shows regular regime with some irregularities at the end of shown interval. Note that these irregularities cannot be easily found using a classical | + | |
+ | HVAC appliance operation can be investigated by means of carpet plots as well. Bellow is a carpet plot (horizontal axis: day, vertical axis: hour of day) of AHU pressure difference. It shows regular regime with some irregularities at the end of displayed | ||
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