What degree is 30 percent?

What degree is 30 percent?

Table of Common Slopes in Architecture

Degrees Gradient Percent
14.04° 1 : 4 25%
15° 1 : 3.73 26.8%
26.57° 1 : 2 50%
30° 1 : 1.73 57.7%

What is the central angle of 30 percent?

Total percentage = 100….Pie Chart.

Item Expenditure (in percentage) Central Angle
Cement 20% (²/₁₀₀ × 360)° = 72°
Steel 10% (¹/₁₀₀ × 360)° = 36°
Labour 25% (²⁵/₁₀₀ × 360)° = 90°
Miscellaneous 30% (³/₁₀₀ × 360)° = 108°

How do you convert percentages into degrees for a pie chart?

Answer. To convert the degree into percentage in pie chart: As we know to find the percentage we divide the number by total of whatever amount and multiply it by 100, now in this case degree needs to be converted into percentage.

How do you find the degrees in a pie chart?

Divide the count for each variable by the total count and then multiply this figure by 360 to determine the angle in degrees. When the pie chart is drawn, the slice of pie for Group A will have an angle of 196.36°; as such, it will represent just over half of the full circle.

How do you turn data into a pie chart?


  1. In your spreadsheet, select the data to use for your pie chart.
  2. Click Insert > Insert Pie or Doughnut Chart, and then pick the chart you want.
  3. Click the chart and then click the icons next to the chart to add finishing touches:

Does a pie chart have to equal 100?

Pie charts are designed to show parts of a whole, so any sum below or above 100% doesn’t represent the entire picture. Finally, when it comes to legends, pie charts don’t generally need one.

What is a pie chart used for?

A pie chart shows how some total amount is divided among distinct categories as a circle (the namesake pie) divided into radial slices. Each category is associated with a single slice whose size corresponds with the category’s proportion of the total.

What can I use instead of a pie chart?

Stacked Bar Charts are the closest linear equivalent to Pie Charts, in terms of both one-to-one mapping and layout. They may be the best alternatives to Pie charts. A single-series Pie chart with N slices is actually equivalent with N series of Full 100% Stacked Bars, each with one single value.

What makes a good pie chart?

Pie charts work best if you only have a few values – four max. If you have more than four shares, consider a stacked column or stacked bar chart. Not only will it look less cluttered, but also the labelling will be tidier. Pie charts might be unnecessary if you only want to show two values.

When should you make a pie chart?

A pie chart is best used when trying to work out the composition of something. If you have categorical data then using a pie chart would work really well as each slice can represent a different category. A good example of a pie chart can be seen below.

When should you avoid a pie chart Doughnut chart?

You should avoid using pie charts when: Your data values are not distinctly separated; data analysis using a pie chart becomes restricted when dealing with data points of similar sizes. You need to compare data for more than one metric. You need to showcase specific data values and facilitate a part-to-part comparison.

What are the disadvantages of a pie chart?


  • do not easily reveal exact values.
  • Many pie charts may be needed to show changes over time.
  • fail to reveal key assumptions, causes, effects, or patterns.
  • be easily manipulated to yield false impressions.

What makes a bad pie chart?

From a design point of view, a pie chart takes up far too much space to convey a set of data compared to other options. In addition, the labels don’t line up, so the result becomes cluttered and hard to read — strike three against pie charts, as they often make the data more complicated than before.

Why is Tufte flat wrong pie chart?

Tufte is wrong to make an assertion about pie charts based on his own context (the analysis and presentation of complex data) and use broad strokes to apply that to domains where he has no expertise (presenting and selling ideas in the boardroom). Pie charts have earned their place in your business presentations.

Why are 3D charts bad?

This is not an original idea. This argument is really about how pie charts are bad, and adding 3D makes them even worse. The underlying point is that 3D tends to skew how we perceive the data. You may think you are adding depth and visual intrigue, but you are actually making it harder to understand.

Are 3D pie charts misleading?

Pie chart. The usage of percentages as labels on a pie chart can be misleading when the sample size is small. Making a pie chart 3D or adding a slant will make interpretation difficult due to distorted effect of perspective. Bar-charted pie graphs in which the height of the slices is varied may confuse the reader.

When should a 3D chart be used?

Another use for a 3d chart is to emphasise important information. Following on from my previous blog on why two charts are often better than one, adding a 3d chart as an auxiliary chart can bring attention to noteworthy trends or values comparisons (NOT individual values).

When would you use a 3D plot?

Use a 3D surface plot to see how a response variable relates to two predictor variables. A 3D surface plot is a three-dimensional graph that is useful for investigating desirable response values and operating conditions. A surface plot contains the following elements: Predictors on the x- and y-axes.

How do you explain a 3D plot?

3D scatter plots are used to plot data points on three axes in the attempt to show the relationship between three variables. Each row in the data table is represented by a marker whose position depends on its values in the columns set on the X, Y, and Z axes.

How do you plot a 3D function?

  1. Draw x, y, and z axes.
  2. Roughly determine the domain of the function you will be graphing.
  3. Draw the box enclosing the three planes just drawn.
  4. Calculate the slice curves for x = 1, 0, -1 and draw them in on the appropriate planes.
  5. Draw the slice curves for y = 1, 0, -1 onto the appropriate planes.

How do you plot a 3D surface?

Basic steps

  1. Establish the domain by creating vectors for x and y (using linspace, etc.)
  2. Create a “grid” in the xy-plane for the domain using the command meshgrid.
  3. Calculate z for the surface, using component-wise computations.
  4. Plot the surface. The main commands are mesh(x,y,z) and surf(z,y,z)

How do you make a 3d function in Python?

Three-Dimensional Plotting in Matplotlib

  1. from mpl_toolkits import mplot3d.
  2. fig = plt. figure() ax = plt. axes(projection=’3d’)
  3. fig = plt. figure() ax = plt. axes(projection=’3d’) ax.
  4. ax. view_init(60, 35) fig. Out[7]:
  5. fig = plt. figure() ax = plt. axes(projection=’3d’) ax.
  6. ax = plt. axes(projection=’3d’) ax.
  7. theta = 2 * np. pi * np.
  8. In [12]: ax = plt.

How do you make an interactive 3d plot in Python?


  1. Create a new figure, or activate an existing figure.
  2. Create fig and ax variables using subplots method, where default nrows and ncols are 1, projection=’3d”.
  3. Get x, y and z using np. cos and np.
  4. Plot the 3D wireframe, using x, y, z and color=”red”.
  5. Set a title to the current axis.
  6. To show the figure, use plt.

What is 3d surface?

A 3D surface model is a digital representation of features, either real or hypothetical, in three-dimensional space. Some simple examples of 3D surfaces are a landscape, an urban corridor, gas deposits under the earth, and a network of well depths to determine water table depth.

Is Plotly Python free?

Yes. Plotly for Python is free and open-source software, licensed under the MIT license. It costs nothing to install and use. You can view the source, report issues or contribute using our Github repository.

How do you make an interactive plot in Python?

You can make a plot in matplotlib, add interactive functionality with plugins that utilize both Python and JavaScript, and then render it with D3. mpld3 includes built-in plugins for zooming, panning, and adding tooltips (information that appears when you hover over a data point).

How do I make a Matplotlib plot interactive?

To configure the integration and enable interactive mode use the %matplotlib magic:

  1. In [1]: %matplotlib Using matplotlib backend: Qt5Agg In [2]: import matplotlib.pyplot as plt.
  2. In [3]: fig, ax = plt. subplots()
  3. In [4]: ln, = ax. plot(range(5))
  4. In [5]: ln. set_color(‘orange’)
  5. In [6]: plt. ioff()
  6. In [7]: plt. ion()

What does Panda do in Python?

pandas is a software library written for the Python programming language for data manipulation and analysis. In particular, it offers data structures and operations for manipulating numerical tables and time series.

How do you read a 3D scatter plot?

Interpret the key results for 3D Scatterplot

  1. Data points that tend to rise together suggest a positive correlation.
  2. Data points that tend to rise as other data points tend to decline suggests a negative correlation.
  3. Outliers fall far from the main group of data points.

How do you make an interactive 3D plot in Python?