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**Category:** New to Julia\
**Created:** [February 15, 2019, 10:08am UTC](https://discourse.julialang.org/t/plaintext-output-in-ijulia-instead-of-html-display/20816 "2019-02-15T10:08:41Z")\
**Posts on this page:** 6\
**Page:** 1
**Author:**  [@Brian\_Thorne](https://discourse.julialang.org/u/Brian_Thorne)\
**Post date:** [February 15, 2019, 10:08am UTC](https://discourse.julialang.org/t/plaintext-output-in-ijulia-instead-of-html-display/20816/1 "2019-02-15T10:08:41Z")
Hopefully a picture conveys my issue:
I’d like to understand why a Polynomial object - which can be rendered beautifully in an IJulia notebook - isn’t rendered nicely by default, and is there a simple recipe to tell IJulia/julia how I’d like my polynomials rendered?
---
**Author:**  [@fredrikekre](https://discourse.julialang.org/u/fredrikekre)\
**Post date:** [February 15, 2019, 1:26pm UTC](https://discourse.julialang.org/t/plaintext-output-in-ijulia-instead-of-html-display/20816/2 "2019-02-15T13:26:55Z")
`IJulia` captures the output in multiple formats and then the frontend decides which format is the “best one”. You can see this if you look at the `.ipynb` file:
```json
"outputs": [
{
"data": {
"text/html": [
"1 + 2∙x + 3∙x^2 + x^4"
],
"text/latex": [
"$1 + 2\\cdot x + 3\\cdot x^{2} + x^{4}$"
],
"text/plain": [
"Poly(1 + 2*x + 3*x^2 + x^4)"
]
},
"execution_count": 3,
"metadata": {},
"output_type": "execute_result"
}
],
```
and, apparently `text/html` is ranked higher than `text/latex` in this case. It is possible to show superscripts in HTML so it seems like this is an oversight in `Polynomials`. I submitted a PR for that: [Display exponents nicely in "text/html" output. by fredrikekre · Pull Request #167 · JuliaMath/Polynomials.jl · GitHub](https://github.com/JuliaMath/Polynomials.jl/pull/167) which results in:
---
**Author:**  [@tkf](https://discourse.julialang.org/u/tkf)\
**Post date:** [February 15, 2019, 10:36pm UTC](https://discourse.julialang.org/t/plaintext-output-in-ijulia-instead-of-html-display/20816/3 "2019-02-15T22:36:06Z")
Untested, but I guess you can do
```julia
append!(empty!(IJulia.ijulia_mime_types), [
MIME("text/plain"),
MIME("image/svg+xml"),
[MIME("image/png"),MIME("image/jpeg")],
[
MIME("text/latex"),
MIME("text/markdown"),
MIME("text/html"),
],
])
```
The original setting is
>
But I’m not sure if this is for user-level configuration.
---
**Author:**  [@Brian\_Thorne](https://discourse.julialang.org/u/Brian_Thorne)\
**Post date:** [February 16, 2019, 12:36am UTC](https://discourse.julialang.org/t/plaintext-output-in-ijulia-instead-of-html-display/20816/4 "2019-02-16T00:36:44Z")
Thanks for opening a PR to fix this straight away @fredrikekre. I didn’t realize that IJulia captures the output in multiple formats - that is quite cool.
@tkf your code was correct to change the default mime type, but as it is changing the default output for all outputs it doesn’t look like something a user should touch!
What the behavior looks like after the fix:
---
**Author:**  [@Brian\_Thorne](https://discourse.julialang.org/u/Brian_Thorne)\
**Post date:** [February 16, 2019, 1:10am UTC](https://discourse.julialang.org/t/plaintext-output-in-ijulia-instead-of-html-display/20816/5 "2019-02-16T01:10:26Z")
If you were trying to override the IJulia output just for Polynomials would this be a reasonable approach?
```julia
using Polynomials
Polynomials.printpoly(io::IO, p::Poly{T}, ::MIME"text/html"; descending_powers=false, offset::Int=0) where {T} =
Polynomials.printpoly(io, p, MIME"text/latex"(), descending_powers, offset)
```
---
**Author:**  [@tkf](https://discourse.julialang.org/u/tkf)\
**Post date:** [February 16, 2019, 5:02am UTC](https://discourse.julialang.org/t/plaintext-output-in-ijulia-instead-of-html-display/20816/6 "2019-02-16T05:02:12Z")
It assumes that HTML renderer has MathJax and configured to recognize `$...$`. I guess it’s fine in IJulia, but if you want to add it to Polynomials.jl maybe you’d want to check `isdefined(Main, :IJulia) && Main.IJulia.inited`.
Or I guess a better way to do it is to set `IOContext` like `:mathjax => true` in IJulia, Documenter, etc. so that packages like Polynomials.jl can change its behavior in text/html `show`.