CAS tools for danish high schools.
Project description
GYM CAS
Anvend Python som CAS (Computational Algebra System) i gymnasiet. Bygger på følgende moduler:
- Algebra/beregninger:
- Afbildninger:
Installation
pip install gym-cas
eller
py -m pip install gym-cas
Cheatsheet
I nedenstående afsnit antages det at gym_cas først importeres således:
from gym_cas import *
B1. Tal- og bogstavregning
expand( udtryk )
factor( udtryk )
B2. Ligninger og uligheder
solve( udtryk )
solve( [udtryk1, udtryk2] )
nsolve( udtryk, startgæt )
solve_interval( udtryk, start, slut )
Opstille ligning
For at opstille en ligning kan man enten omforme sin ligning så en af siderne er lig 0 (og udelade 0) eller bruge Eq.
Ligningen x/2 = 10 kan skrives som x/2-10 eller som Eq(x/2, 10).
Ligningsløsning ved solve(x/2-10) eller solve(Eq(x/2, 10)) giver samme resultat.
B3. Geometri og trigonometri
Sin( vinkel )
Cos( vinkel )
Tan( vinkel )
aSin( forhold )
aCos( forhold )
aTan( forhold )
B4. Analytisk plangeometri
plot_points( X_list ,Y_list)
plot( funktion )
plot_implicit( udtryk ,xlim=( x_min, x_max),ylim=( y_min, y_max))
plot_geometry( Geometrisk objekt )
Flere grafer i en afbildning
p1 = plot( udtryk1 )
p2 = plot( udtryk2 )
p = p1 + p2
p.show()
B5. Vektorer
a = vector(x,y)
a.dot(b)
plot_vector( vektor )
plot_vector( start, vektor )
plot_vector( [vektor1, vektor2, ...])
B6. Deskriptiv Statistik
Ugrupperet
max( data )
min( data )
mean( data )
median( data )
var( data, ddof )
std( data, ddof )
kvartiler( data )
percentile( data , procenter )
frekvenstabel( data )
boxplot( data )
plot_sum( data )
Grupperet
group_mean( data, grupper )
group_percentile( data, grupper, procenter )
group_var( data, grupper, ddof )
group_std( data, grupper, ddof )
frekvenstabel( data, grupper )
boxplot( data, grupper )
plot_sum( data, grupper )
plot_hist( data, grupper )
B8. Funktioner
def f(x):
return funktionsudtryk
f(3)
def f(x):
return Piecewise(( funktion1, betingelse1), (funktion2, betingelse2)) # Betingelser kan sammensættes med &
plot( funktion , yscale="log")
plot( funktion , (variabel, start, stop), xscale="log", yscale="log")
regression_poly(X,Y, grad)
regression_power(X,Y)
regression_exp(X,Y)
B9. Differentialregning
limit( udtryk, variabel, grænse, retning )
diff( funktion )
def df(xi):
return diff( funktion ).subs( variabel, xi )
B10. Integralregning
integrate( udtryk )
integrate( udtryk, ( variabel, start, slut ))
plot3d_revolution( udtryk , (x, a, b),parallel_axis="x")
A1. Vektorer i rummet
a = vector(1,2,3)
a.cross(b)
plot_vector( a )
plot3d_points( X, Y, Z )
plot3d_line( a + t * r )
plot3d_plane( a + s * r1 + t * r2 )
plot3d_plane( ligning, (x, x_min, x_max), (y, y_min, y_max), (z, z_min, z_max) )
plot3d_sphere( radius, centrum )
plot3d_implicit( ligning, backend=PB ) # Kræver Plotly eller K3D
A4. Differentialligninger
f = Function('f')
dsolve( ode )
plot_ode( ode, (x, start, stop), (f, start, stop))
A5. Diskret Matematik
X = [ udregning for x in range(start,slut)]
X = [ startbetingelse ]
for i in range(start, slut):
X.append( rekursionsligning )
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