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Engineering Visualizations

From Bode plots and Nyquist diagrams to PID step responses, FFT analysis, vibration monitoring, and control system design - create publication-ready engineering figures with AI-generated Python code.

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Essential Engineering Visualizations

Engineering data spans frequency-domain analyses, transient responses, spectral decompositions, and multi-variable optimization surfaces. Each requires specialized plotting techniques with proper axis scaling and annotation conventions.

Bode Plots

Frequency response magnitude and phase for system stability analysis

Nyquist Diagrams

Parametric stability plots with critical point encirclement detection

Step Response

Transient analysis with overshoot, settling time, and rise time metrics

FFT / Spectral Analysis

Frequency domain decomposition for vibration and signal processing

Root Locus

Pole-zero migration as gain varies for controller design

Control Surface Plots

3D response surfaces for multi-variable system optimization

Why Engineers Use Plotivy

Control Theory Ready

Bode, Nyquist, root locus, and step response plots with proper frequency-domain formatting.

Signal Processing

FFT, power spectral density, and spectrogram analysis from time series data.

Publication Formats

Export to SVG/PDF sized for IEEE, ASME, or Automatica journal requirements.

Parametric Studies

Sweep across damping ratios, gains, or operating conditions with automated overlays.

Bode Plot - Frequency Response

Second-order system frequency response across five damping ratios. Magnitude in dB and phase in degrees on a shared log-frequency axis. Adjust damping values in the code to see resonance peaks shift.

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Learn by Experimenting

This is a safe playground for learning! Try changing:

  • • Colors: Modify color values to see different palettes
  • • Numbers: Adjust sizes, positions, or data ranges
  • • Labels: Update titles, axis names, or legends

Edit the code, run it, then open the full data visualization tool to continue with your own dataset.

PID Controller Step Response

Comparison of P, PI, and PID controllers on a second-order plant. The top subplot shows output tracking; the bottom subplot shows error decay. A +/- 2% settling band highlights steady-state accuracy.

Live Code Editor
Code EditorPython
Loading editor...
Live Preview

Preparing preview

Running once automatically on first load

Learn by Experimenting

This is a safe playground for learning! Try changing:

  • • Colors: Modify color values to see different palettes
  • • Numbers: Adjust sizes, positions, or data ranges
  • • Labels: Update titles, axis names, or legends

Edit the code, run it, then open the full data visualization tool to continue with your own dataset.

Chart gallery

Explore Engineering Chart Types

Interactive examples with ready-to-run code

Browse all chart types →
Multi-line graph showing temperature trends for 3 cities over a year
Time Series•matplotlib, seaborn
From the chart gallery•Stock price tracking over time

Line Graph

Displays data points connected by straight line segments to show trends over time.

Sample code / prompt

import matplotlib.pyplot as plt
import numpy as np

# Generate temperature data for 3 major US cities over 12 months
months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
nyc = [30, 32, 40, 52, 65, 75, 82, 81, 74, 63, 50, 38]
miami = [65, 66, 70, 76, 82, 87, 90, 90, 87, 80, 72, 66]
chicago = [25, 27, 35, 48, 62, 72, 80, 79, 71, 60, 45, 32]

# Create figure with enhanced styling
Scatter plot of height vs weight colored by gender with regression line
Statistical•matplotlib, seaborn
From the chart gallery•Correlation analysis between metrics

Scatterplot

Displays values for two variables as points on a Cartesian coordinate system.

Sample code / prompt

import matplotlib.pyplot as plt
import numpy as np
from scipy import stats
import pandas as pd

# Generate sample data
np.random.seed(42)
n_samples = 200
height = np.random.normal(170, 8, n_samples)
weight = height * 0.6 + np.random.normal(0, 8, n_samples) - 50
Correlation heatmap with diverging color scale and coefficient annotations
Statistical•seaborn, matplotlib
From the chart gallery•Correlation analysis between variables

Heatmap

Represents data values as colors in a two-dimensional matrix format.

Sample code / prompt

import matplotlib.pyplot as plt
import seaborn as sns
import pandas as pd
import numpy as np

# Create correlation matrix for financial metrics
metrics = ['Revenue', 'Profit', 'Expenses', 'ROI', 'Customers', 'AOV', 'Marketing', 'Employees']
correlation_data = np.array([
    [1.00, 0.85, -0.45, 0.72, 0.88, 0.65, 0.72, 0.55],
    [0.85, 1.00, -0.78, 0.92, 0.75, 0.58, 0.63, 0.48],
Box and whisker plot comparing gene expression across 4 genotypes with significance brackets
Distribution•seaborn, matplotlib
From the chart gallery•Comparing experimental groups in scientific research

Box and Whisker Plot

Displays data distribution using quartiles, median, and outliers in a standardized format.

Sample code / prompt

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns
from scipy import stats

# Generate gene expression data for 4 genotypes
np.random.seed(42)
genotypes = ['WT', 'KO1', 'KO2', 'Mutant']
n_per_group = 20
Bar chart comparing average scores across 5 groups with error bars
Comparison•matplotlib, seaborn
From the chart gallery•Comparing performance across categories

Bar Chart

Compares categorical data using rectangular bars with heights proportional to values.

Sample code / prompt

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns
from scipy import stats

# Generate performance scores for 5 treatment groups
np.random.seed(42)
groups = ['Control', 'Treatment A', 'Treatment B', 'Treatment C', 'Treatment D']
n_samples = 30

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