Move to :png with GR

[jlperla]

From teaching, students frequently forget to Trust the notebook. The main place this causes issues is that the graphs disappear when they reopen it.

I think the solution is to use the png wherever plots comes up. That is,

using Plots

globally becomes

using Plots
gr(fmt=:png)

---

Getting Started with Julia

• [ ] Setting up your Julia Environment
• [x] An Introductory Example
• [x] Julia Essentials and more material
• [x] Fundamental Types with more material
• [x] Introduction to Types and Generic Programming

More Programming and Software Engineering Principles

• [ ] Generic Programming
• [ ] The Need for Speed
• [ ] Plotting in Julia
• [x] Useful Libraries

Tools and Techniques

• [x] Linear Algebra
• [ ] Orthogonal Projections and their Applications
• [x] LLN and CLT
• [ ] Linear State-Space Models
• [x] Finite Markov Chains
• [ ] Continuous State Markov Chains
• [x] A First Look at the Kalman Filter

Dynamic Programming

• [ ] Shortest Paths
• [x] Job Search I: The McCall Search Model
• [x] Job Search II: Search and Separation
• [ ] A Problem that Stumped Milton Friedman
• [x] Job Search III: Search with Learning
• [x] Job Search IV: Modeling Career Choice
• [x] Job Search V: On-the-Job Search
• [x] Optimal Growth I: The Stochastic Optimal Growth Model
• [ ] Optimal Growth II: Time Iteration
• [x] Optimal Growth III: The Endogenous Grid Method
• [ ] LQ Dynamic Programming Problems
• [x] Optimal Savings I: The Permanent Income Model
• [x] Optimal Savings II: LQ Techniques
• [x] Consumption and Tax Smoothing with Complete and Incomplete Markets
• [x] Optimal Savings III: Occasionally Binding Constraints
• [ ] Robustness
• [x] Discrete State Dynamic Programming

Multiple Agent Models

• [x] Schelling's Segregation Model
• [x] A Lake Model of Employment and Unemployment
• [ ] Rational Expectations Equilibrium
• [x] Markov Perfect Equilibrium
• [ ] Asset Pricing I: Finite State Models
• [x] Asset Pricing II: The Lucas Asset Pricing Model
• [ ] Asset Pricing III: Incomplete Markets
• [ ] Uncertainty Traps
• [x] The Aiyagari Model
• [x] Default Risk and Income Fluctuations
• [ ] Globalization and Cycles

Time Series Models

• [x] Covariance Stationary Processes
• [ ] Estimation of Spectra
• [ ] Additive Functionals
• [x] Multiplicative Functionals
• [x] Classical Control with Linear Algebra
• [ ] Classical Filtering with Linear Algebra

Dynamic Programming Squared

• [ ] Dynamic Stackelberg Problems
• [ ] Optimal Taxation in an LQ Economy
• [x] Optimal Taxation with State-Contingent Debt
• [x] Optimal Taxation without State-Contingent Debt

[arnavs]

Done at 62065ce.